STANZIONE, L. Geography And Political Geography: Notes On The Thought Of Friedrich Ratzel. Bollettino della Società Geografica Italiana, [S. l.], p. 305–316, 2005. DOI: 10.36253/bsgi-7039. Disponível em: https://www.bsgi.it/index.php/bsgi/article/view/7039. Acesso em: 15 oct. 2026.