Mel’nichenkoI. P., & PlaksaS. A. (1996). Potential fields with axial symmetry and algebras of monogenic functions of a vector variable. II. Ukrains’kyi Matematychnyi Zhurnal, 48(12), 1695-1703. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/5191