BÖLL, V. In memoriam Friedrich Heyer (1908–2005). Aethiopica, [S. l.], v. 9, n. 1, p. 229–231, 2006. DOI: 10.15460/aethiopica.9.1.253. Disponível em: https://journals.sub.uni-hamburg.de/aethiopica/article/view/253. Acesso em: 25 apr. 2024.