Citation: Ap. Russell et Hn. Bryant, Claw retraction and protraction in the Carnivora: the cheetah (Acinonyx jubatus) as an atypical felid, J ZOOL, 254, 2001, pp. 67-76
Citation: Dc. Lee et Hn. Bryant, A reconsideration of the coding of inapplicable characters: Assumptions and problems, CLADISTICS, 15(4), 1999, pp. 373-378