1. The History of Biology: An Introduction;BODENHEIMER,1958
2. W. BENTON, The Works of Aristotle Volume II, History of Animals (translated by D. W. Thompson), Book V, Chapter I and Book VIII, Chapter 1; On the Generation of Animals (translated by A. Platt), Book III, Chapter 11, Encyclopaedia Britannica, Chicago (1952). pp. 65, 114, 302.
3. Great Experiments in Biology;PASTEUR,1955
4. On the Origin of Life
5. On the Evidences of Inorganic Evolution