GUSAK, D. V.; KULIK, A. M. The third ukrainian-scandinavian conference on probability theory and mathematical statistics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 2, p. 288, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4418. Acesso em: 5 dec. 2025.