1. Sexual dimorphism and breeding systems in pinnipeds, ungulates, primates, and humans;Alexander,1979
2. Sexual Selection;Andersson,1994
3. Life history and reproductive behaviour;Boness,2000
4. Potential for sperm competition in baleen whales;Brownell;Rep. Int. Whaling Comn.,1986
5. The social and reproductive biology of humpback whales: An ecological perspective;Clapham;Mamm. Rev.,1996