Skrypnyk, V. I. “Periodic Coulomb Dynamics of Two Equal Negative Charges in the Field of Six Equal Positive Fixed Charges”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 12 (December 24, 2020): 1682-1696. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/917.