@article{PM_1993_1993_1_a6,
     author = {Gourlay, Boris},
     title = {Envolventes polinomiales de variedades reales en {C2.}},
     journal = {Publicacions matem\`atiques},
     pages = {225-238},
     year = {1993},
     volume = {37},
     number = {1},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PM_1993_1993_1_a6/}
}