Myrberget, S., Erikstad, K. E., Blom, R., & Spidsø, T. K. (1985). Estimation of nesting success and frequency of re-laying in Willow Grouse Lagopus lagopus. Ornis Fennica, 62(1), 9–12. Retrieved from https://ornisfennica.journal.fi/article/view/133165