1. Bull Breeding Soundness Evaluation;Barth,2000
2. Utilization,2010
3. Tackling Climate Change Through Livestock – A Global Assessment of Emissions and Mitigation Opportunities;Gerber,2013
4. Chapter 37: Waste Management in Beef Cattle Manual, fourth ed., E-913;Hamilton,2004
5. The Veterinary Examination of Bulls;McGowan,1995