Ballo, P. “Monitoring of Alpine Marmot (Marmota Marmota Latirostris) Colonies in the West Tatra Mountains - III.”. Oecologia Montana, Vol. 15, no. 1-2, Dec. 2006, pp. 15-20, http://om.vuvb.uniza.sk/index.php/OM/article/view/187.