1. Ashlock, P. D. 1974. The uses of cladistics. Ann. Rev. Ecol. Syst.5:81–99.
2. Belyaeva, E. I., B. A. Trofimov, and V. Y. Reshetov. 1974 [Translation]. Fundamental stages in the evolution of mammals of the late Mesozoic-Paleogene of central Asia. In N. N. Kramerenko, V. Luvsanvandan, Y. I. Voronin, R. Barsbold, A. K. Rozhdestvensky, B. A. Trofimov, and V. Y. Reshetov, eds., Mesozoic andCenozoic Faunas and Biostratigraphy of Mongolia. The Joint Soviet-Mongolian Paleontological Expedition, Trans., I, Science Press, Moscow.
3. Bohlin, B. 1951. Some mammalian remains from Shih-ehr-ma-ch’eng, Hui-hui-p’u area, western Kansu, pp. 1–47. In S. Hedin. Reports from the Scientific Expedition to the North-Western Provinces of China, Vol. 6. Vertebrate Paleontology 5, Stockholm.
4. Brundin, L. 1966. Transantarctic relationships and their significance, as evidenced by chironomid midges with a monograph of the subfamilies Podonominae and Aphroteniinae and the austral Heptagyiae. K. Sven. Vetenskakad. Handl., Ser. 4 11:1–472 (especially pp. 11–45).
5. Butler, P. M. 1972. The problem of insectivore classification, pp. 253–265. In K. A. Joysey and T. R. Kemp, eds., Studies in Vertebrate Evolution. Oliver and Boyd, Edinburgh.