Raczkowska, Zofia. «Observations on Nivation and Its Geomorphological Effects in Mountains at High Latitude (with Mt. Njulla Massif in Northern Sweden As Example)». Pirineos 136 (diciembre 30, 1990): 19–32. Accedido abril 29, 2024. https://pirineos.revistas.csic.es/index.php/pirineos/article/view/201.