Sapel’nikov V.P., Mizens A.G., Mizens L.I. New palaeobiospherologic method of evolution study of Paleozoic biota and Earth stratisphere // Geology of the Devonian system: Proceedings of the International Symposium. July 9–12, 2002, Syctyvkar, Komi Republic, Russia. Syctyvkar: Geoprint, 2002. P. 114–115.
