@article{10_5427_jsing_2014_8f,
     author = {Bruno Sc\'ardua},
     title = {Singularities of complex vector fields having many closed orbits},
     journal = {Journal of Singularities},
     pages = {69--82},
     publisher = {mathdoc},
     volume = {8},
     year = {2014},
     doi = {10.5427/jsing.2014.8f},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2014.8f/}
}