1. Die Vorsokratiker;Capelle,1953
2. Vererbungswissenschaft;Barthelmess,1952
3. The human genome project: past, present, and future;Watson;Science,1990
4. Aristotle. De Generatione Animalium. Bk 2, 1; Historia Animalium. Bk 6, 37.
5. Experiments in plant hybridization;Mendel;Verh Naturforsch Vereines Brunn,1865