1. Abdala, F., Rubidge, B.S., and Heever, J.A., The oldest therocephalians (Therapsida, Eutheriodontia) and the early diversification of Therapsida, Palaeontology, 2008, vol. 51, pp. 1011–1024.
2. Abdala, F., Kammerer, C.F., Day, M.O., Jirah, S., and Rubidge, B.S., Adult morphology of the therocephalian Simorhinella baini from the middle Permian of South Africa and the taxonomy, paleobiogeography, and temporal distribution of the Lycosuchidae, J. Paleontol., 2014, vol. 88, pp. 1139–1153.
3. Arefiev, M.P., Golubev, V.K., Balabanov, Yu.P., Karasev, E.V., Minikh, A.V., Minikh, M.G., Molostovskaya, I.I., Yaroshenko, O.P., and Zhokina-Naumcheva, M.A., Type and reference sections of the Permian–Triassic continental sequences of the East European Platform: Main isotope, magnetic, and biotic events, in Proc. XVIII Int. Congr. on the Carboniferous and Permian. Sukhona and Severnaya Dvina Rivers Field Trip. August 4–10, 2015, Moscow: Paleontol. Inst. Russ. Acad. Sci., 2015.
4. Mammal-like Reptiles from Russia;B. Battail,2000
5. Benton, M.J., Newell, A.J., Khlyupin, A.Yu., Shumov, I.S., Price, G.D., and Kurkin, A.A., Preservation of exceptional vertebrate assemblages in middle Permian fluviolacustrine mudstones of Kotel’nich, Russia: Stratigraphy, sedimentology, and taphonomy, Palaeogeogr., Palaeoclimatol., Palaeoecol., 2012, vols. 319–320, pp. 58–83.