LANDO, F. Ratzel’s Geography: Soil, State And People. Bollettino della Società Geografica Italiana, [S. l.], p. 477–512, 2012. DOI: 10.36253/bsgi-7389. Disponível em: https://bsgi.it/index.php/bsgi/article/view/7389. Acesso em: 15 oct. 2026.