1. The nutrient requirements of pigs;Agricultural Research Council,1981
2. A review;Aherne,1985
3. Factors that influence litter size in pigs: Part 1;Clark;Pig News Inf.,1986
4. Sow culling: reasons for and effect on productivity;Dagorn;Livest. Prod. Sci.,1979
5. Evolution et variation de la prolificité entre la première et la seconde portée;Dagorn;J. Rech. Porcine France,1984