KIES, Otfried. Der "Tübinger Vertrag" von 1514. Zeitschrift des Zabergäuvereins, [S. l.], n. 2, p. 21–24, 2014. DOI: 10.53458/rrxbsb71. Disponível em: https://journals.wlb-stuttgart.de/index.php/zz/article/view/19345. Acesso em: 11 mar. 2026.