Oliveira Regilene and Schlomiuk Dana and Travaglini Ana Maria: Geometry and integrability of quadratic systems with invariant hyperbolas. (2021)
Oliveira Regilene and Schlomiuk Dana and Travaglini Ana Maria and Valls Claudia: Geometry, integrability and bifurcation diagrams of a family of quadratic differential systems as application of the Darboux theory of integrability. (2021)
Mencinger Matej and Ferčec Brigita and Fernandes Wilker and Oliveira Regilene: Linearizability problem of persistent centers. (2018)