SZUKALSKI, Jerzy. Institution of social election observers in Polish electoral law. Studia Wyborcze, [S. l.], v. 27, p. 7–18, 2019. DOI: 10.26485/SW/2019/27/1. Disponível em: https://journals.ltn.lodz.pl/Studia-Wyborcze/article/view/518. Acesso em: 8 dec. 2025.