POSTNIKOV, A. V. Contact and conflict: Russian mapping of Finland and the development Russian cartography in the 18th and 19th centuries. Fennia - International Journal of Geography, [S. l.], v. 171, n. 2, p. 63–98, 1993. Disponível em: https://fennia.journal.fi/article/view/8872. Acesso em: 19 may. 2024.