KUMAR, Umesh. Study about Realism and Tangible and intangible elements of national power. Universal Research Reports, [S. l.], v. 4, n. 7, p. 159–162, 2017. Disponível em: https://urr.shodhsagar.com/index.php/j/article/view/236. Acesso em: 22 nov. 2024.