KRADIN, N. N. Nomadism, Evolution and World-Systems: Pastoral Societies in Theories of Historical Development. Journal of World-Systems Research, [S. l.], v. 8, n. 3, p. 368–388, 2002. DOI: 10.5195/jwsr.2002.266. Disponível em: http://jwsr.pitt.edu/ojs/jwsr/article/view/266. Acesso em: 23 feb. 2024.