SAVANDER, O. Tabeller för uträknande af gradafdeluings- eller polyeder projektion emellan Finlands latitudsgrader. Fennia - International Journal of Geography, [S. l.], v. 3, n. 1, p. 1–8, 1890. Disponível em: https://fennia.journal.fi/article/view/155721. Acesso em: 10 jan. 2025.