Gwinner, Eberhard Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society; Emeritus, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Gwinner, E. (1975). Effects of season and external testosterone on the freerunning circadian activity rhythm of European Starlings (Sturnus vulgaris). Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 103(3), 315-328. doi:10.1007/BF00612024.