GRAF, A. Der Hüter der Zeit. AKMB-news: Informationen zu Kunst, Museum und Bibliothek, [S. l.], v. 15, n. 1, p. 69–71, 2011. DOI: 10.11588/akmb.2009.1.6150. Disponível em: https://journals.ub.uni-heidelberg.de/index.php/akmb-news/article/view/6150. Acesso em: 18 apr. 2024.