Pulliainen, E. “Food Selection in the Tetraonid Hybrids Lyrurus Tetrix X Tetrao Urogallus, Lyrurus Tetrix X Lagopus Lagopus and Tetrao Urogallus X Lagopus Lagopus”. Ornis Fennica 59, no. 4 (December 31, 1982): 170–174. Accessed April 19, 2025. https://ornisfennica.journal.fi/article/view/133109.