Neutron activation analysis applied to the study of the composition of Cuban geological samples from petroleum ores / E.Herrera,V.M.Nazarov,O.Diaz,M.Montero, 1991. - 10 p. - Текст : непосредственный.
Stury of the behaviour of rare earth elements and other elements in rocks from a petroleum ore by neutron activation analysis / E.F.Herrera,V.M.Nazarov,O.Diaz и др., 1991. - 23 p. - Текст : непосредственный.