Does variation of sex ratio enhance reproductive success of offspring in tawny owls (Strix aluco)
B. M. Appleby, S. J. Petty, J. K. Blakey, P. Rainey, and D. W. Macdonald
Proc Biol Sci. 1997 August 22; 264(1385): 1111–1116. doi: 10.1098/rspb.1997.0153.PMCID: PMC1688563