Skrypnik, W. I. “On the Holomorphic Solutions of Hamiltonian Equations of Motion of Point Charges”. Ukrains’kyi Matematychnyi Zhurnal 63, no. 2 (February 25, 2011): 270–280. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/2715.