1. Computing simplest normal forms for the Takens–Bogdanov singularity;Algaba;Qualitative Theory of Dynamical Systems,2003
2. Algaba A, Freire E, Gamero E, Garcı́a C. An algorithm for computing quasi-homogeneous normal forms under equivalence, 2002, preprint
3. Normal forms and bifurcations of planar vector fields;Chow,1994
4. Doedel E, Champneys AR, Fairgrieve T, Kuznetsov YA, Sandstede B, Wang X. AUTO97, Continuation and bifurcation software for ordinary differential equations (with HomCont), 1998
5. Generic 3-parameter families of vector fields on the plane, unfolding a singularity with nilpotent linear part. The cusp case of codimension 3;Dumortier;Ergodic Theory and Dynamical Systems,1987