1. Performance of D'man and Sardi sheep on accelerated lambing. III. Lamb mortality, growth and production per ewe;Berger;Small Rumin. Res.,1989
2. Genetic and environmental effects of growth to 1 year and viability of lambs from a crossbreeding study of D'man and Sardi breeds;Boujenane;J. Anim. Sci.,1991
3. De Boer, J., 1989. Vergelijking Flevolander en Swifter schaap. Proefstation voor de Ruudveehouderij, Schapenhouderij en Paardenhouderij (PR), Lelystad, Publikatie No. 61, 29 pp. (Comparison of Flevolander and Swifter sheep. Research Station for cattle, sheep and horse, Lelystad Publication No. 61, 29 pp)
4. Derycke, G., Bister, J.L., Paquay, R., 1990. Reproductive capacity in rams: effect of season and breed. Abstracts. Vol. II: 244. 41st Ann. Meet. Eur. Ass. Anim. Prod. 9–12 July, Toulouse
5. Seasonal changes in breeding activity, testicular size, testosterone concentration and seminal characteristics in rams with long or short breeding season;Dufour;J. Anim. Sci.,1984