M. F. Gorodnii, V. Y. Danilov, V. V. Kirichenko, N. A. Perestyuk, and A. M. Samoilenko, “Dmytro Ivanovych Martynyuk (on the 70th anniversary of his birthday)”, Ukr. Mat. Zhurn., vol. 64, no. 4, pp. 571-573, Apr. 2012.