Comments on the H.Beghin papers 2013, Vol. 9, No. 4, pp. 765-766 Author(s): Ivanov A. P. Citation: Ivanov A. P., Comments on the H.Beghin papers, Rus. J. Nonlin. Dyn., 2013, Vol. 9, No. 4, pp. 765-766 DOI:10.20537/nd1304012 Download File PDF, 213.71 Kb This work is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License