Review of quantum physics and atomic theory,
Dalip Singh Verma, Jagdish Kumar and Pooja Chauhan,
Modern Luminescence from Fundamental Concepts to Materials and Applications Volume 1: Concepts of Luminescence, Woodhead Publishing publications (Elsevier), ISBN: 978-0-323-89954-3 (print) ISBN: 978-0-323-98470-6 (online). https://doi.org/10.1016/B978-0-323-89954-3.00006-5
Quantum theory of many electron atoms and energy levels,
Jagdish Kumar, Pooja Chauhan and Dalip Singh Verma,
Modern Luminescence from Fundamental Concepts to Materials and Applications Volume 1: Concepts of Luminescence, Woodhead Publishing publications (Elsevier), ISBN: 978-0-323-89954-3 (print) ISBN: 978-0-323-98470-6 (online). https://doi.org/10.1016/B978-0-323-89954-3.00008-9
Scopes of laser in spectroscopy,
Dalip Singh Verma, Navadeep Shrivastava and Surender Kumar Sharma,
Modern Luminescence from Fundamental Concepts to Materials and Applications Volume 1: Concepts of Luminescence, Woodhead Publishing publications (Elsevier), ISBN: 978-0-323-89954-3 (print) ISBN: 978-0-323-98470-6 (online). https://doi.org/10.1016/B978-0-323-89954-3.00007-7