Mitropolskiy, Y. A., Parasyuk, I. O., Samoilenko, A. M. and ShkiI, N. I. (2006) “Nikolai Perestyuk (60th birthday)”, Ukrains’kyi Matematychnyi Zhurnal, 58(1), pp. 113-114. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3437 (Accessed: 5May2024).