Hall, Michael R. Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Hall, M. R. (1987). External stimuli affecting incubation behavior and prolactin secretion in the duck (anas-platyrhynchos). Hormones and Behavior, 21(3), 269-287. doi:10.1016/0018-506x(87)90015-8.