The infinitesimal 16th Hilbert problem in the quadratic case

A survey of quadratic systems

W. A. Coppel · Journal of Differential Equations · 1966 · 277 citations

Natural Sciences, Computer Science, Mathematics +11

Quadratic Systems with Center and Their Perturbations

Journal of Differential Equations · 1994 · 258 citations

Natural Sciences, Mathematics, Dynamical Systems +11

On the number of limit cycles which appear by perturbation of separatrix loop of planar vector fields

Robert Roussarie · Bulletin of the Brazilian Mathematical Society New Series · 1986 · 244 citations

Natural Sciences, Mathematics, Dynamical Systems +12

On the Number of Limit Cycles in Perturbations of Quadratic Hamiltonian Systems

Emil Horozov, I. Iliev · Proceedings of the London Mathematical Society · 1994 · 124 citations

Natural Sciences, Mathematics, Dynamical Systems +11

Estimate of the number of zeros of an abelian integral depending on a parameter and limit cycles

Alexander Varchenko · Functional Analysis and Its Applications · 1984 · 109 citations

Natural Sciences, Computational Engineering, Zero-based Budgeting +4