Sokolov 1965. Evolyutsiya zubov nekotorykh rodov melovykh akul i rekonstruktsiya ikh ozubleniya. [Evolution of the teeth of some genera of Cretaceous sharks and reconstructions of their dentitions.] Byulleten Moskovskogo Obshchestva Ispytatelei Prirody (Geol), 40(4) 1965: 133-134