Mitropolsky, Y.A. and Shevelo, V.N. (1970) “Nikolai Ivanovich Muskhelishvili (on his 80th birthday)”, Ukrains’kyi Matematychnyi Zhurnal, 23(1), pp. 49–51. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8478 (Accessed: 6 December 2025).