1. Effect of Season on Age at Puberty in Crossbred Gilts in Sweden;Bane,1976
2. Puberty and Estrous Activity in Confinement-Reared Swine;Christenson,1979
3. Seasonal Influence on Estrous Activity in Sows and Gilts;Hurtgen;Journ. Am. Vet. Med. Assn.,1980
4. Influence of Farm Management and Breed Type on Sow's Conception-Weaning Interval and Productivity in France;Aumaitre;Livestock Prod. Sci.,1976
5. Variations Saisonnieres de la Reproduction de la Trui et Facteurs Favorisant L'anoestrus Temporale;Corteel,1964