COGGIN, T. D. Change, Persistence and Convergence in NATO Member Defense Spending. European Journal of Economics, [S. l.], v. 2, n. 2, p. 51–65, 2022. DOI: 10.33422/eje.v2i2.253. Disponível em: https://diamondopen.com/journals/index.php/eje/article/view/253. Acesso em: 11 oct. 2025.