00728nam0-22002531i-450-990001258490403321000125849FED01000125849(Aleph)000125849FED0100012584920000920d19----km-y0itay50------baengPerturbation Methods in Applied Mathematicsby KevorkianNew York [etc.]Springer-Verlag19Applied mathematical sciences34Kevorkian,J.26223ITUNINARICAUNIMARCBK990001258490403321C-33-(3420330MA1MA1Perturbation Methods in Applied Mathematics381066UNINAING01