Gipp, S.K. & Kuznetsov, A.P. (1961)
O vozraste zubov akuly Carcharodon megalodon, naydennykh v sovremennykh donnykh otlozheniyakh Atlanticheskogo okeana [On the age of teeth of the shark Carcharodon megalodon, found in modern bottom deposits of the Atlantic Ocean]. Okeanologiya, 1, 305-307