KONTEV, Arkadii Vasil'evich. The first images of the Ob River on Western European maps. Vestnik of Saint Petersburg University. History, [S. l.], v. 66, n. 3, p. 971–989, 2023. DOI: 10.21638/spbu02.2021.316. Disponível em: https://history-journal.spbu.ru/article/view/15669. Acesso em: 5 nov. 2024.