@article{PM_2000_2000_1_a25,
     author = {Brunella, Marco and Mendes, Luis Gustavo},
     title = {Acotando el grado de soluciones a las ecuaciones de {Pfaff.}},
     journal = {Publicacions matem\`atiques},
     pages = {593-604},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2000_2000_1_a25/}
}