ЗАРІЧНИЙ, Михайло Михайлович; ПТАШНИК, Богдан Йосипович. HE STOOD AT SOURCES OF A NEW MATHEMATICAL DISCIPLINE – TOPOLOGIES: To 55 - anniversary of departure in Eternity of the prominent Ukrainian mathematician and teacher, actual member of Scientific society named by Shevchenko Myron Zarytsky. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 1(37), p. 314–330, 2019. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/94. Acesso em: 11 apr. 2025.