Copenhagen Declaration as of December 7, 2009. project baikal, Irkutsk, Russian Federation, v. 8, n. 27, p. 42–43, 2011. DOI: 10.7480/projectbaikal.27.356. Disponível em: https://projectbaikal.com/index.php/pb/article/view/356. Acesso em: 10 may. 2026.