Charles L. Hayes, Esther S. Rubin, Mark C. Jorgensen, Randall A. Botta, Walter M. Boyce, Mountain Lion Predation of Bighorn Sheep in the Peninsular Ranges, California, The Journal of Wildlife Management, Vol. 64, No. 4 (Oct., 2000), pp. 954-959
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Hayes et al. (2000) studied this question.