Peter Grubb, “Order Artiodactyla,” In Don E. Wilson & DeeAnn M. Reeder (eds.), Mammal Species of the World (3rd ed.), Volume 1, Johns Hopkins University Press, 2005, Pages 637-722.
Taylor,Charles R.(1966).“The Vascularity and Possible Thermoregulatory Function of the Horns in Goats”.Physiological Zoology39(2): 127–139.doi:10.1086/physzool.39.2.30152426.ISSN0031-935X.
Taylor,Charles R.(1966).“The Vascularity and Possible Thermoregulatory Function of the Horns in Goats”.Physiological Zoology39(2): 127–139.doi:10.1086/physzool.39.2.30152426.ISSN0031-935X.