35 years of keeping and breeding of European Bison (Bison bonasus) at Thüringer Waldzoo Gera. European Bison Conservation Newsletter, [S. l.], v. 2, p. 165–171, 2009. Disponível em: https://ojs.wisent.org/index.php/czasopismo/article/view/186. Acesso em: 28 jul. 2026.