Alexander von Humboldt in Ust’-Kamenogorsk. HiN - Alexander von Humboldt im Netz. Revue internationale d’études humboldtiennes, [S. l.], v. 15, n. 29, p. 58–69, 2014. DOI: 10.18443/198. Disponível em: https://hin-online.de/index.php/hin/article/view/198. Acesso em: 28 mars. 2026.