Nachruf auf Dr. Rupert Hacker (1935–2016). o-bib. Das offene Bibliotheksjournal / Herausgeber VDB, [S. l.], v. 3, n. 4, p. 350–352, 2016. DOI: 10.5282/o-bib/2016H4S350-352. Disponível em: https://o-bib-ojs3test.ub.uni-muenchen.de/bib/article/view/2016H4S350-352.. Acesso em: 18 jan. 2025.