1.
Tjernberg M, Johnsson K, Nilsson SG. Density variation and breeding success of the Black Woodpecker Dryocopus martius in relation to forest fragmentation. Ornis Fenn [Internet]. 1993Sep.30 [cited 2024Nov.22];70(3):155–162. Available from: https://ornisfennica.journal.fi/article/view/133377