Dumortier, F. (1991). Bifurcations of planar vector fields nilpotent singularities and Abelian integrals / F. Dumortier ... [et al.]: Nilpotent singularities and Abelian integrals. Springer-Verlag. https://doi.org/10.1007/BFb0098353
Chicago Style (17th ed.) CitationDumortier, Freddy. Bifurcations of Planar Vector Fields Nilpotent Singularities and Abelian Integrals / F. Dumortier ... [et Al.]: Nilpotent Singularities and Abelian Integrals. Berlin ; New York: Springer-Verlag, 1991. https://doi.org/10.1007/BFb0098353.
MLA (9th ed.) CitationDumortier, Freddy. Bifurcations of Planar Vector Fields Nilpotent Singularities and Abelian Integrals / F. Dumortier ... [et Al.]: Nilpotent Singularities and Abelian Integrals. Springer-Verlag, 1991. https://doi.org/10.1007/BFb0098353.