SZCZEŚNIAK , Krystyna. A few words about Stanisław, not necessarily about Ulaszek. Studia Rossica Gedanensia, [S. l.], p. 487–491, 2015. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/SRG/article/view/4474. Acesso em: 22 jul. 2024.