B. M. Efimov. 1991. First discovery of the ichthyosaur opthalmosaurus in the Kimmeridgian of the USSR. Paleontological Journal
Bibliography (1)
G. W. Storrs, M. S. Arkhangel'skii, and V. M. Efimov. 2000. Mesozoic marine reptiles of Russia and other former Soviet republics. The age of dinosaurs in Russia and Mongolia