LIS, A. Family law of the Piast Poland - analysis of the sources. Przegląd Prawno-Ekonomiczny, [S. l.], n. 29 (4), p. 74–81, 2014. DOI: 10.31743/ppe.15803. Disponível em: https://czasopisma.kul.pl/index.php/ppe/article/view/15803. Acesso em: 19 maj. 2025.