Kazimierz Szczerkowski and Jan Żabiński, promoters of European bison restitution by zoos. European Bison Conservation Newsletter, [S. l.], v. 15, p. 93–104, 2023. Disponível em: https://ojs.wisent.org/index.php/czasopismo/article/view/204. Acesso em: 28 jul. 2026.