Structurally unstable quadratic vector fields of codimension two families possessing either a cusp point or two finite saddle-nodes
Joan C Artés Regilene Delazari dos Santos Oliveira; Alex Carlucci Rezende
Journal of Dynamics and Differential Equations New York v. 33, n. 4, p. 1779-1821, Dec. 2021New York 2021
Localização: ICMC - Inst. Ciên. Mat. Computação (PROD-3001568 )(Acessar)