1. Estrus detection;O'Connor,2007
2. Estrus detection;Smith,1986
3. Effect of body condition on productivity in beef cattle: factors affecting calf crop;Kunkle,1994
4. Methods of surgical preparation of teaser bulls;Claxton;Compendium Contin Educ Pract Vet,1989
5. Surgical preparation of estrus-detector males;Wolfe,1998