@article{10_4153_CMB_2017_026_6,
     author = {Llibre, Jaume and Valls, Claudia},
     title = {Global {Phase} {Portraits} for the {Abel} {Quadratic} {Polynomial} {Differential} {Equations} of the {Second} {Kind} {With} {Z2-symmetries}},
     journal = {Canadian mathematical bulletin},
     pages = {149--165},
     year = {2018},
     volume = {61},
     number = {1},
     doi = {10.4153/CMB-2017-026-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2017-026-6/}
}