Plaksa, S. A. “On the Solution of the Exterior Dirichlet Problem for an Axisymmetric Potential”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 12 (December 25, 2002): 1634–1641. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4202.