ANUSIK, Z. Who was countess Dorothea von Helfenstein? A contribution to the genealogy of the Kurzbach and the Helfenstein families in the 15th century. Przegląd Nauk Historycznych, Łódź, v. 16, n. 3, p. 225–240, 2017. DOI: 10.18778/1644-857X.16.03.10. Disponível em: https://czasopisma.uni.lodz.pl/pnh/article/view/3190. Acesso em: 5 maj. 2024.