Forstmeier, Wolfgang Abteilung Kempenaers, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Forstmeier, W., Rochester, J. R., & Millam, J. R. (2008). Digit ratio unaffected by estradiol treatment of zebra finch nestlings. General and Comparative Endocrinology, 156(2), 379-384. doi:10.1016/j.ygcen.2008.01.007.