Gorokhov et al. 1981

Gorokhov I.M., Clauer N., Varshavskaya E.S., Kutyavin E.P., Drannik A.S. Rb-Sr ages of Precambrian sediments from the Ovruch Mountain Range, northwestern Ukraine (U.S.S.R.) // Precambrian Research 1981. V. 16. № 1/2. P. 55-65.