Gryshchuk, S. V., and S. A. Plaksa. “Integral Representations of Generalized Axially Symmetric Potentials in a Simply Connected Domain”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 2 (February 25, 2009): 160–177. Accessed April 16, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3012.