@article{PM_1989_1989_1_a2,
     author = {Costa, Antonio F.},
     title = {Nota sobre el grado de {C{\textordmasculine}-suficiencia} de curvas planas.},
     journal = {Publicacions matem\`atiques},
     pages = {37-46},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1989_1989_1_a2/}
}