@mastersthesis{mastersthesis336105f1,
title   = {Geometrical and topological investigation of some families of quadratic differential systems possessing saddle-nodes or invariant ellipses},
author = {Mota, Marcos Coutinho and Ferragud, Joan Carles Artés and Oliveira, Regilene Delazari dos Santos and Rezende, Alex Carlucci},
year = {2021},
school = {Universidade de São Paulo}
}