00907nam0-22003011i-450-9900013223204033213-540-54521-2000132232FED01000132232(Aleph)000132232FED0100013223220000920d1991----km-y0itay50------baengBifurcations of planar vector fieldsNilpotent singularities and abelian integralsby F Dumortier, R. Roussarie, J.Sotomajor, H. Zoladek.BerlinSpringer-Verlag1991.VIII, 226 p.Lecture Notes in Mathematics1480Dumortier,Freddy53294ITUNINARICAUNIMARCBK990001322320403321C-20-(14808848MA1MA158f1434c05Bifurcations of planar vector fields81215UNINAING01