Kotsos, B. A., and M. E. Grypeos. “A Simplified Analytic Treatment of Shell-Effects in Metal Clusters”. HNPS Advances in Nuclear Physics 13 (February 20, 2020): 229–233. Accessed May 7, 2024. https://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/2973.