Skrypnik, W. I. (2016) “Two-dimensional Coulomb dynamics of two and three equal negative charges in the field of two equal fixed positive charges”, Ukrains’kyi Matematychnyi Zhurnal, 68(11), pp. 1528-1539. Available at: http://umj.imath.kiev.ua/index.php/umj/article/view/1939 (Accessed: 30September2022).