SAMOILENKO, A.M. Ronto, N.I Shokurov, Vladimir Numerical-Analytic methods of investigating periodic solutions / [by] A.M.Samoilenko, N.I.Ronto; translated by Vladimir Shokurov - Moscow MIR pub. 1979 - 183 p. Includes references. ISBN: 62095 Dewey Class. No.: 515.35 / SAM