1. Aberle, S. D. and Corner, G. W.: 1953, Twenty-Five Years of Sex Research, W. B. Saunders, Philadelphia.
2. Aristotle: 1910, ‘History of Animals’, in J. A. Smith and W. D. Ross (eds.), The Works of Aristotle, trans. D. W. Thompson, vol. 4, Clarendon Press, Oxford.
3. Biggs, R. D.: 1967, SA.ZI.GA: Ancient Mesopotamian Potency Incantations, in Texts from Cuneiform Sources, II.
4. Bloch, I.: n.d., The Sexual Life of Our Time, trans. from 6th German edition by M. E. Paul, Allied Book Company, New York.
5. Boissier, A.: 1893, ‘Summa Alua’, Revue Sémitique
1, 171 ff.