PTASHNIK, B. I.; SAMOILENKO, A. M. The Skorobogat’ko international mathematical conference. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 1, p. 143–144, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3582. Acesso em: 6 dec. 2025.