STENGEL, Walter; KIES, Otfried. Der Gollenstein von Botenheim. Zeitschrift des Zabergäuvereins, [S. l.], n. 1, p. 7–16, 2006. DOI: 10.53458/4n3gbt60. Disponível em: https://journals.wlb-stuttgart.de/index.php/zz/article/view/19464. Acesso em: 11 mar. 2026.