GorbachukM. L., ZadereiP. V., LukovskyI. O., MakarovV. L., MotornyiV. P., RomanyukA. S., SamoilenkoA. M., SerdyukA. S. and SharkoV. V. (2012) “Oleksandr Ivanovych Stepanets’ (on the 70 th anniversary of his birthday)”, Ukrains’kyi Matematychnyi Zhurnal, 64(5), pp. 579-581. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2598 (Accessed: 27July2024).