Hogstad, Olav. “Are Wintering Common Redpolls Carduelis Flammea More Exposed to Avian Predators Than Other Small Passerines?”. Ornis Norvegica 40 (November 9, 2017): 45–48. Accessed April 6, 2025. https://boap.uib.no/index.php/ornis/article/view/1359.