KETTLER, W. Johannes Fries: "Günstling" Zwinglis, Lexikograph und Pädagoge. Zwingliana, [S. l.], v. 19, n. 1, p. 207–221, 2010. Disponível em: https://zwingliana.ch/index.php/zwa/article/view/512. Acesso em: 23 oct. 2021.