@article{GRSME_2004_2004_1_a10,
     author = {Ferreiro Darriba, Juan Bosco and  L\'opez Pouso, \'Oscar},
     title = {L{\'\i}mites utilizando coordenadas polares.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {405-434},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2004},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2004_2004_1_a10/}
}