Ciereszko A, Kowalczyk A, Lukaszewicz E, Krzywinski A, Kobus A, Dietrich GJ. Sperm characteristics of male hybrid from a cross between male Black Grouse Tetrao tetrix and female Capercaillie T. urogallus. Ornis Fenn [Internet]. 2009Dec.31 [cited 2024May18];86(4):149–152. Available from: https://ornisfennica.journal.fi/article/view/133736