City Business Centre – Timişoara. project baikal, Irkutsk, Russian Federation, v. 8, n. 27, p. 100–105, 2011. DOI: 10.7480/projectbaikal.27.370. Disponível em: https://projectbaikal.com/index.php/pb/article/view/370. Acesso em: 10 may. 2026.