Gwarancja: [Guarantee]. Studia Prawnicze / The Legal Studies, [S. l.], n. 1, p. 9–50, 1960. DOI: 10.37232/sp.1960.1.1. Disponível em: https://czasopisma.inp.pan.pl/index.php/sp/article/view/3794. Acesso em: 18 aug. 2025.