1. Bonhommet, N. and Babkin, J., Sur la presence daimantations inverses daus la Chaine des Pujs, C.R. Acad. Sci. Paris, 1967, vol. 264, pp. 92–94.
2. Golovanova, L.V., Doronichev, V.B., Cleghorn, N.E., Koulkova, M.A., Sapelko, T.V., and Shackley, M.S., Significatice of ecological factors in the Middle to Upper Paleolithic transition, Curr. Anthropol., 2010, vol. 51, no. 5, pp. 655–691.
3. Kulakov, S.A., Baryshnikov, G.F., Kul’kova, M.A., and Sapelko, T.V., Akhshtyr cave site: some results of the studies, Pyataya Kubanskaya arkheologicheskaya konferentsiya (5th Kuban Archaeological Conference), Krasnodar: Kuban Univ., 2009, pp. 200–206.
4. Kulikova, L.S. and Pospelova, G.A., Short-term inversion of the geomagnetic field 40 ka ago, Izv. Akad. Nauk SSSR, Fiz. Zemli, 1979, no. 6, pp. 52–64.
5. Laj, C. and Channell, J.E.T., Geomagnetic excursions, Treatise Geophys., 2007, vol. 5, no. 10, pp. 373–416.