REFOYO ACEDO, Enrique Javier. EVOLUTION OF TECHNOLOGY AND FRONTIERS IN SPANISH MILITARY GEOGRAPHY (1859-1936), GENERAL CONSIDERATIONS. Journal of the Spanish Institute for Strategic Studies, [S. l.], n. 21, p. 229–253 / 477, 2023. Disponível em: https://revista.ieee.es/article/view/5396. Acesso em: 28 jul. 2026.