FROSTERUS, B. Några iakttagelser angående skiktade moräner samt rullstensåsar. Fennia - International Journal of Geography, [S. l.], v. 3, n. 1, p. 1–10, 1890. Disponível em: https://fennia.journal.fi/article/view/155725. Acesso em: 10 jan. 2025.