NICZYPORUK, P. Janusz Marian Sondel (1937–2017). Miscellanea Historico-Iuridica, [S. l.], v. 17, n. 2, p. 243–245, 2019. Disponível em: http://miscellanea.uwb.edu.pl/article/view/40. Acesso em: 4 jun. 2023.