1. THESIS U KANSAS 1977
2. AZZAROLI, A, GIORNALE DI GEOLOGIA 41: 61 (1977).
3. DEBEAUMONT, G, ECLOGAE GEOLOGICAE HELVETIAE 57: 837 (1964).
4. Ewer, R. F., The Carnivores: 25 (1973).
5. GLASS, G.E., MULTIVARIATE COMPARISON OF SOME EXTANT AND FOSSIL FELIDAE, CARNIVORE 1: 80 (1978).