DEGOIS , G. Εξωτερικόν εμπόριον και στατιστική . SPOUDAI Journal of Economics and Business, [S. l.], v. 1, n. 2-3, p. 232–235, 1951. Disponível em: http://spoudai.org/index.php/journal/article/view/26. Acesso em: 20 sep. 2024.