Report number 170 from Kvismare Bird Observatory:

Selection and evolutionary potential of spring arrival phenology in males and females of a migratory songbird

Tarka M, Hansson B & Hasselquist D

Article in journal

Journal of Evolutionary Biology. 2015. Volume 28, issue 5, page(s) 1024-1038. https://doi.org/10.1111/jeb.12638