BERBIG, Roland. Grünheide, Grünheide. Helga M. Novak und Robert Havemann. Studia Germanica Gedanensia, [S. l.], n. 36, p. 29–38, 2017. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/SGG/article/view/1323. Acesso em: 17 cze. 2025.