Acknowledged in print for assistance in development of the following publications

D-W Lee, S. Lee, J-E. Lim, and S. Woo, Classical and digital homotopy classes, Topology and its Applications 2024, 108892 

D-W Lee, On the digital Hopf images and monoid isomorphisms, Publicationes Mathematicae Debrecen 103 (1-2) (2023), 13–39

J. Haarmann, M.P. Murphy, C.S. Peters, and P. Christopher Staecker, Homotopy Equivalence in Finite Digital Images, Journal of Mathematical Imaging and Vision 53 (3) (2015), 288 - 302

David I. Schneider, An Introduction to Programming Using Visual Basic 2012, 9th ed., Pearson Education,  Upper Saddle River, NJ, 2014

P. Deitel, H. Deitel, and A. Deitel, Simply Visual Basic 2010: An App-Driven Approach, 4th edition, Pearson Education (Prentice Hall), 2013


Tony Gaddis, Kip Irvine, and Bruce Denton, Starting Out with Visual Basic .Net, 2nd ed., Pearson Education, Upper Saddle River, NJ


T. Gaddis and K. Irvine, Starting Out with Visual Basic 2005, Addison-Wesley


J. Salvage, The Visual Basic 2005 Coach, 2nd Edition, Addison-Wesley