SCHMIDT, W. F. Die Steppenschluchten Südrusslands. ERDKUNDE, [S. l.], v. 2, n. 2, p. 213–229, 1948. DOI: 10.3112/erdkunde.1948.02.04. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/891. Acesso em: 29 may. 2025.