SUNDELL, A. F. Snötäckets höjd i Finland vintern 1891—1892. Fennia - International Journal of Geography, [S. l.], v. 9, n. 1, p. 1–96, 1894. Disponível em: https://fennia.journal.fi/article/view/157147. Acesso em: 24 feb. 2025.