1. Hormonal control of reproductive and parental behaviour in fishes;Baggerman,1968
2. Competition between color morphs of the polychromatic Midas cichlid Cichlasoma citrinellum;Barlow;Science,1973
3. The Midas cichlid in Nicaragua;Barlow,1975
4. Hormonal Control and Behavioral Context of the Nuchal Hump in Cichlasoma citrinellum (Pisces: Cichlidae);Bleick,1974
5. Die Rolle des Prolaktins bei der Cichlidenbrutpflege;Blüm;Fortschr. Zool,1974