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31. The clique graph of a co graph (with Aparna Lakshmanan. S.), Proceedings of the International Conference on Discrete Mathematics, Ramanujan Mathematical Society, Lecture Notes Series, No: 7 (2008), 227-232.
32. A note on energy of some graphs (with G. Indulal) MATCH, Communications in Mathematical and in Computer Chemistry, 59 (2008), 269 – 274. (MR 2008 m 05176).
33. Distance energy of graphs (with G. Indulal, I. Gutman) MATCH, Communications in Mathematical and in Computer Chemistry, 60 (2008), 461-472 (MR2009 i 05148).
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35. A note on some domination parameters in graph products (with Aparna Lakshmanan.S.) – The Journal of Combinatorial Mathematics and Combinatorial Computing, 69 ( 2009 ), 31- 37. ( MR 2010d:05114).
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41. The gamma graph of a graph ( with Aparna Lakshmanan, S ) , AKCE. International J. Graphs. Combin. 7, No. 1 (2010), 53-59. (MR 2011f:05230)
42. Power domination in honeycomb networks ( with Seema Varghese, D.Ferrero)- Journal of Discrete Math.Sciences and Cryptography,14 (2011), 521-529.
43. Containers and wide diameters of P3 (G) ( with Manju K Menon, D.Ferrero)- Math Bohem.. ,No: 4, 137,(2012), 383-393.
44. On the planarity of iterated star line graphs ( with Seema Varghese), AKCE International Journal of Graphs and Combinatorics, Vol 9, No:1 (2012), 1-9.
45. Weakly clique irreducibility of NEPS of two graphs, ( with Aparna Lakshmanan,S Tao- Ming Wang), Util. Math, 92 (2013) , 351-358.
46. Diameter variability in the Cartesian product of graphs,(with Chitra, M R), Discrete Mathematics, Algorithms , Applications. ( 2014).
47. Domination criticality of the product graphs,(with Chitra, M.R.), AKCE Int. J. Graphs Comb., 12 (2015),19-25.
48. The median problem on k-partite graphs,(with Pravas, K ), Discussions Mathematicae Graph Theory 35 (2015) 439–446 doi:10.7151/dmgt.1802
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50. Convex Median and Anti-Median at Prescribed Distance (with Pravas, K.), Journal of Combinatorial Optimization, 33 , (2017), 1021-1029 .
51. Component factors of the Cartesian product of graphs,(with Chitra, M.R.) Asian-European Journal of Mathematics, (2016).
52. The diameter variability of product graphs,(with Chitra , M.R.), The Journal of Combinatorial Mathematics and Combinatorial Computing,(2016).
53. Heredity for generalised power domination (with Paul Dorbec, Seethu Varghese), Discrete Mathematics and Theoretical Computer Science, 18(3), 31-37, ( 2016).
54. Some network topological notions of the Mycielskian of a graph (with K S Savitha), AKCE International Journal of Graphs and Combinatorics (2016).
55. Reciprocal Graphs ( with G. Indulal), Malaya J.Mat.4,(2016), 380-387.
56. Generalised power domination in WK- Pyramid networks, ( with Seethu Varghese) , Bull ICA, Vol 78, (2016), 52-68.
57. On the Power domination Number of Graph products, ( with Seethu Varghese), LNCS(Springer), Vol. 9602 (2016) , 357- 367.
58. The k- power bondage number of a graph ( with Seethu Varghese ), Discrete Mathematics, Algorithms , Applications., Vol 8, No: 4 (2016).
59. On an edge partition and root graphs of some classes of line graphs ( with Pravas. K) , Electronics Journal of Graph theory and Its Applications, 1-15, 2017 .
60. Some diameter notions of the generalised Mycielskian of a graph ( with K.S. Savitha, Chitra M. R.) , Proceedings of the International Conference on Discrete Mathematics and Theoretical Computer Science, Kalasalingam University, December 2016. LNCS ( Springer ), Lecture Notes in Comput. Sci., 10398, Springer, Cham, 371–382, 2017.
61. Further progress on the heredity of the game domination number ( with Tijo James, Paul Dorbec ), Proceedings of the International Conference on Discrete Mathematics and Theoretical Computer Science, Kalasalingam University, December 2016. LNCS ( Springer ), to appear in 2017.
62. The median problem on Symmetric Bipartite Graphs (with Pravas, K.), Proceedings of the International Conference on Discrete Mathematics and Theoretical Computer Science, Kalasalingam University, December 2016. LNCS ( Springer ), Lecture Notes in Comput. Sci., 10398, Springer, Cham, 262–270, 2017.
63. The diameter variability of the product graphs.(with Chitra M.R.), J. Combin. Math. Combin. Comput. 103 (2017), 159–170.
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65. Distance Energy Change in bipartite graph due to edge deletion (with Wasin So and Anu Varghese), Linear Algebra and its Applications, 553 (2018),211-222.
66. The Domination Game on Split Graphs (with Tijo James and Sandi Klavzar), Bulletin of the Australian Mathematical Society , April 2019 , 327 – 337 doi:10.1017/S0004972718001053
67. Domination game: Effect of edge contraction and edge subdivision (with Tijo James) – Discuss. Math. Graph Theory,doi:10.7151/dmgt.2378. 16 December 2020.
68. Wiener index and Steiner 3-Wiener index of a graph (with Matjaˇz Kovˇse, Rasila V. A. ) – Asian European Journal of Mathematics, 14 (9),2150165 (2021).
69. Steiner Wiener index of block graphs (with Matjaˇz Kovˇse, Rasila V. A. ) – AKCE.International Journal of Graphs and Combin. 17 (3 ) (2020), 830-840.
70. Split Graphs with Exactly Four Distinct Eigenvalues ( with Anu Varghese, Steve Kirkland, Felix Goldberg), Disc..Appl. Math (2020).
71. On spectral radius of signed graphs without negative even cycles (with Z.Stanic)-Bulletin Mathematique de la Societe des sciences Mathematiques de Roumanie, Vol 64, (2021), 89-96.
72. Bounds on the Steiner Wiener index of graphs (with Rasila, V.A.)- Discrete Mathematics, Algorithms and Applications (2021)
73. Steiner Wiener index of line graphs (with Rasila, V.A) , Indian J Pure Appl Math 53, 932–938 (2022). https://doi.org/10.1007/s13226-021-00199-1
74. On cycle graphs (with Seema Varghese, Severino Gervacio)- Asian-European Journal of Mathematics, Vol. 16, No. 3 (2023) 2350036
75. Mycielskian of graphs with small game domination number (with Tijo James)- The Art of Discrete and Applied Mathematics (2023)
76. Power Domination in Mycielskian of Spiders (with Seema Varghese, Seethu Varghese) – AKCE International Journal of Graphs and Combinatorics (2023).
77. On regular triangle-distinct graphs (with Dragan Stevanović, Mohammad Ghebleh, Gilles Caporossi, Sanja Stevanović),Computational and Applied Mathematics (2024) 43:336.
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1. Mathematical Induction, Science Reporter, 493-494, Sept. 1987,.
2. Olympiads to Scout Maths Talence, Indian Express, October 20, 1991.
3. Math Puzzles on Chess Boards, Science India , August 2003.
4. A Meeting with the Missile Man - An Interview with Dr. A.P.J. Abdul Kalam, Honourable President of India. Science India, November 2003.
5. An Olympiad of a different kind, Educational Plus, The Hindu , March 2004.
6. Mathematical Olympiads and Some other Greater Challenges in Mathematics, Science India, May 2006.
7. In conversation with Prof C.R. Rao - A Polymath amongst Statisticians, Science India, April 2007.
8. Srinivasa Ramanujan - Tribute to a Natural Genius, Science India, December 2008.
9. In conversation with a chaos consultant- Interview with Prof.Robert Devaney, President, Mathematical Association of America, Science Reporter (NISCAIR-CSIR ) November 2014.
10. An academic pilgrimage to Srinivasa Ramanujan’s Kumbhakonam, Science India, January 2015.
11.Sasthrayaan- A Unique project on quality science in Kerala, Science Reporter, (NISCAIR-CSIR) , February 2015.
12.Applications of Mathematics - Excitements and Challenges, Mathematics Teacher, February 2015.
13. Homage to Dr. A P J Abdul Kalam - a Visionary Indian , Science India, April 2016.
14.In Conversation with Prof. Michael Barnsley, A Topologist turned Fractal Geometer, Science Reporter, (NISCAIR-CSIR) , July 2017.
15. Graph Theory 1736-1936 and beyond -Parts I,II,III The Bulletin of Mathematics Consortium, July 2022,October 2022, July 2023.
16. Quiz on Ramanujan, Science Reporter (CSIR), August 2022
1. On National Mathematics Year- 2012, Field’s Medal, Abel Prize, Olympiad etc in the Malayala Manorama year book 2013 (Malayalam). 407-413.
2. Prayogikatha Arinju Kanakku Padikkam (Let us learn mathematics knowing the applications, Horizon, Malayala Manorama, May 18, 2015.
3. Arbhudhavum Kanakkum Thammil ( Mathematical Oncology) , Mathrubhumi Nagaram , November 10, 2017.
4. Masthishkavum Kanakkum Thammil ( Brain Networks), Mathrubhumi, Nagaram, December 21, 2018.
5. Kadal kadannu padarnnoru indian dhishana- (About Srinivasa Ramanujan) , Mathrubhumi Weekly, April 26-May 2, 2020.
6. Enpathinte niravil or bhauthika sasthranjan,Interview with Babu Joseph on his 80th birthday, Ezhuthu Magazine, August 2020.
7. Big datayude athikaayanu noorinte niravu, (Hundred years tribute to C R Rao) Kalakaumudi, Nov.22-29, 2020.
8. Mathai prabhavam- sasthrathilum, sammohyasasthrathilum- (Mathews effect in Science), Ezhuthu Magazine, March 2021.
9. Ganithathinte Nobel -Fields medal veendum oru Vanitha ganithanjaye thedi ethumbol (On Fields medal- When it reaches a Woman Mathematician again), Mathrubhumi .com, August 2022.
10. Beethovante Pathaam Symphony Nirmitha budhikondu shrishtikkumbol , (Beethovens Tenth Symphony recreated using AI)Mathrubhumi .com -December 2022.
11. Nammal Evide Nilkkunnu, engottu pokunnu ( Human Brain networks and Inner GPS),Mathrubhumi.com May 2023.
Padhippura - a section for students in Malayala Manorama daily.
12. Laksham Laksham Kaaryangal ( on Data Science and Big Data Analytics) - 28th December 2016 .
13. One plus one is one ( in honour of George Boole on his 200th birth anniversary), 4th November 2015.
14. Kaalathinu Munpe ( on Late Dr APJ Abdul Kalam) , 14 October 2015.
15. Internettile Ganitha Lokam ( on GIMPS and OEIS), 12 June 2015
16. Onnamane Kandethan ( Mathematics of rankings), 1 August 2014.
17. Friend of Infinity, It is not in the marks, ( About Srinivasa Ramanujan), 20 Dec 2013.
18. If Math goes wrong, Bhoomiyude Kanakku ( Math of Planet Earth), July 15, 2013
19. Kanakkilanu Karyam( on Srinivasa Ramanujan),21st December 2012.
20. Ganitha Bharatham, 26 June 2012.
21. Chessile Kanakku ( Math on Chess boards), 26th September 2011.
22. Prakrithyude Ganitha Sasthranjan ( a tribute to Benoit Mandelbrot)- 24 November, 2010.
23. Rasathanthrathile Ganitha Rasam ( on graph theory and chemistry), 7 July 2010.
24. 36 Officermarude Prasnam ( on the Problem of 36 Officers), November 25,2009.
25. The number 786 , August 17, 2009.
26. Kanakkile Indian Karuthu (on C R Rao and S R S Varadhan), October 22, 2008.
27. 666- Mrigathinte Samghya (Number of the Beast), June 25, 2008.
28. Ganitha Samrajyathile Rangjimar (on Women Mathematicians), January 2, 2008.
29. Computerinte Kanakku ( on Coding Theory ) , December 5, 2007.
30. Sasthra Kudumbam (on Bernoullis Family), August 8, 2007.
31. Rahasyangalude Kanakkupetti (on Cryptology), January 29, 2007.
32. Thala Thirinchalum Kozhappmillla (on Palindromes, Collatz Problem etc.), December 18, 2006.
33. Quadratic Samavakyavum Sreedharcharyarum, October 20, 2006.
34. Oru Minnal Oli pole ( Biographies of Galois, Abel, Riemann), October 16, 2006.
35. Ganitha Samryajathile Chakravarthimar, ( Biographies of Gauss, Euler, Fermat, Cauchy, Descartes), August 23, 2006.
36. Hruswa mengilum artha deerghamam ( Quiz on Ramanujan), August 11, 2006.
37. Prakrithyude Bhasha Kanakku - Quiz : Aug 2, 2006.
38. Kanakkinte Rajakumaran- Quiz- July 24, 2006.
39. Kanakku Padikkan Stampukal ( on Mathematics through postal stamps), November 21, 2005.
40. Field’s Medal- Kanakkinte Nobel, Kaithiri (Malayala Manorama), November 2001.