[1]
BerezanskyY. M., KorolyukV. S., KreinS. G., MitropolskiyY. A., SamoilenkoA. M., and SkorokhodA. V., “Yurii L’vovich Daletskii”, Ukr. Mat. Zhurn., vol. 49, no. 3, pp. 323–325, Mar. 1997.