Piotr Górecki, Economy, Society, and Lordship in Medieval Poland, 1100-1250. Zeitschrift für Ostmitteleuropa-Forschung, [S. l.], v. 44, n. 3, p. 456–458, 1995. DOI: 10.25627/19954436018. Disponível em: https://openjournals.osmikon.de/zfo/article/view/6018. Acesso em: 16 sep. 2026.