@article{JEMS_2017_19_8_a3,
     author = {Fedor Pakovich},
     title = {Solution of the parametric center problem for the {Abel} differential equation},
     journal = {Journal of the European Mathematical Society},
     pages = {2343--2369},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {2017},
     doi = {10.4171/jems/719},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/719/}
}