Laskemoen T, Kleven O, Fossøy F, Lifjeld JT. Intraspecific variation in sperm length in two passerine species, the Bluethroat Luscinia svecica and the Willow Warbler Phylloscopus trochilus. Ornis Fenn [Internet]. 2007Sep.30 [cited 2024Nov.23];84(3):131–139. Available from: https://ornisfennica.journal.fi/article/view/133689