Singh, Birbikaram, Sushil Kumar, Manoj K. Sharma, and S. K. Patra. “Extensions of Natural Radioactivity to 4th-Type and of the Periodic Table to Super-Heavy Nuclei: Contribution of Raj K Gupta to Cold Nuclear Phenomena”. Journal of Nuclear Physics, Material Sciences, Radiation and Applications 1, no. 2 (February 24, 2014): 133–143. Accessed July 22, 2024.