Ghosh, D., and C. Sinha. “A Comparative Study of Ionization of Hydrogenic Ions by Positronium Impact”. Journal of Atomic, Molecular, Condensed Matter and Nano Physics 3, no. 2 (August 22, 2016): 105–113. Accessed April 29, 2024. http://www.rgnpublications.com/journals/index.php/jamcnp/article/view/484.