Janiga, M., and E. Romanová. “The Biology of the Alpine Accentor Prunella Collaris. II. Behaviour: Rhytmic Aspects of Maintenance Activities”. Oecologia Montana 6, no. 1-2 (December 1, 1997): 45-48. Accessed April 23, 2024. https://om.vuvb.uniza.sk/index.php/OM/article/view/96.