The Geometry of Quadratic Differential Systems with a Weak Focus of Second Order. - Joan C. Artés; Jaume Llibre; Dana Schlomiuk (Int. J. Bifurc. Chaos, 2006)

Singular Points of Quadratic Systems: a Complete Classification in the Coefficient Space R12. - Joan C. Artés; Jaume Llibre; Nicolae Vulpe (Int. J. Bifurc. Chaos, 2008)

The Geometry of Quadratic Polynomial Differential Systems with a Weak Focus and an Invariant Straight Line. - Joan C. Artés; Jaume Llibre; Dana Schlomiuk (Int. J. Bifurc. Chaos, 2010)

Global phase Portraits of quadratic Polynomial differential Systems with a Semi-Elemental Triple Node. - Joan C. Artés; Alex C. Rezende; Regilene D. S. Oliveira (Int. J. Bifurc. Chaos, 2013)

The Geometry of Quadratic Polynomial Differential Systems with a Finite and an Infinite Saddle-Node (A, B). - Joan C. Artés; Alex C. Rezende; Regilene D. S. Oliveira (Int. J. Bifurc. Chaos, 2014)

Piecewise linear differential systems with two real saddles. - Joan C. Artés; Jaume Llibre; Joao C. Medrado; Marco Antonio Teixeira (Math. Comput. Simul., 2014)

The Geometry of Quadratic Polynomial Differential Systems with a Finite and an Infinite Saddle-Node (C). - Joan C. Artés; Alex C. Rezende; Regilene D. S. Oliveira (Int. J. Bifurc. Chaos, 2015)

Topological Classification of Quadratic Polynomial Differential Systems with a Finite Semi-Elemental Triple Saddle. - Joan C. Artés; Regilene D. S. Oliveira; Alex C. Rezende (Int. J. Bifurc. Chaos, 2016)

Uniform isochronous cubic and quartic centers: Revisited. - Joan C. Artés; Jackson Itikawa; Jaume Llibre (J. Comput. Appl. Math., 2017)

Quadratic Differential Systems with a Finite Saddle-Node and an Infinite Saddle-Node (1, 1)SN - (A). - Joan C. Artés; Marcos C. Mota; Alex C. Rezende (Int. J. Bifurc. Chaos, 2021)

Quadratic Differential Systems with a Finite Saddle-Node and an Infinite Saddle-Node (1, 1)SN - (B). - Joan C. Artés; Marcos C. Mota; Alex C. Rezende (Int. J. Bifurc. Chaos, 2021)

Global Analysis of Riccati Quadratic Differential Systems. - Joan C. Artés; Jaume Llibre; Dana Schlomiuk; Nicolae Vulpe (Int. J. Bifurc. Chaos, 2024)

Quadratic Systems Possessing an Infinite Elliptic-Saddle or an Infinite Nilpotent Saddle. - Joan C. Artés; Marcos C. Mota; Alex C. Rezende (Int. J. Bifurc. Chaos, 2024)