@article{PM_1989_1989_1_a4,
     author = {Paramonov, Peter V.},
     title = {Aproximaci\'on racional cerca de conjuntos de ceros de funciones.},
     journal = {Publicacions matem\`atiques},
     pages = {59-68},
     year = {1989},
     volume = {33},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1989_1989_1_a4/}
}