FOSTER, D. M. Haldi, Stacy Bergstrom. Why Wars Widen: A Theory of Predation and Balancing. Journal of Conflict Studies, [S. l.], v. 24, n. 2, 2004. Disponível em: https://journals.lib.unb.ca/index.php/JCS/article/view/213. Acesso em: 14 jul. 2020.