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Chenoweth, P. J., Chase, C. C., Larsen, R. E., Thatcher, M. - J. D., Bivens, J. F., & Wilcox, C. J. (1996). The assessment of sexual performance in young Bos taurus and Bos indicus beef bulls. Appl. Anim. Behav. Sci., 48(3-4), 225–235.
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Gosden, T.  P., & Svensson, E.  I. (2009). Density-Dependent Male Mating Harassment, Female Resistance, and Male Mimicry. Am Nat, 173(6), 709–721.
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