RAJNIK, Eugeniusz. Verzeichnis der Veröffentlichungen von Professor Bernard Piotrowski. Folia Scandinavica Posnaniensia, [S. l.], v. 10, p. 11–36, 2009. Disponível em: https://pressto.amu.edu.pl/index.php/fsp/article/view/3564. Acesso em: 4 may. 2024.