@article{EXMATH_2006_2006_1_a10,
     author = {Llibre, Jaume and Pessoa, Claudio},
     title = {Campos vectoriales polin\'omicos homog\'eneos de grado 2 sobre la esfera de dos dimensiones.},
     journal = {Extracta mathematicae},
     pages = {167-190},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2006_2006_1_a10/}
}