1. Observations on postnatal development of the penis in Merino ram lambs and wethers: the possible relationship to the passage of urinary calculi;Belonje;J.S. Afr. Vet. Med. Ass.,1965
2. Functional development of accessory glands and spermatogensis;Davies;Nature, U.K.,1947
3. Puberty in Merino rams;Dun;Aust. Vet. J.,1955
4. Puberal development of clun forest ram lambs in relation to time of birth;Dyrmundsson;J. Agric. Sci., U.K.,1972
5. Development of sexual activity in male Damascus goats;Elwishy;Indian J. Anim. Sci.,1971