SUNDELL, A. F. Snötäckets höjd i Finland Januari—Maj 1891. Fennia - International Journal of Geography, [S. l.], v. 7, n. 1, p. 1–60, 1892. Disponível em: https://fennia.journal.fi/article/view/156965. Acesso em: 24 feb. 2025.