@article{QUE_1987_1987_1_a19,
     author = {P\'erez Vidal, Lluis and Brunet Crosa, Pere},
     title = {Generaci\'on adaptativa de contornos de nivel.},
     journal = {Q\"uestii\'o},
     pages = {87-101},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/QUE_1987_1987_1_a19/}
}