(untitled) - Kuramshin,E.M.; Gumerova,V.K.; Dyachenko,V.A.; Kulak,L.G.; Molyavko,M.A.; Kochinashvili,M.V.; Mufteev,A.F.; Zelotskii,S.S.; Rakhmankulov,D.L. (Zh. Obshch. Khim., 1988)