@article{CLTM_1963_1963_1_a0,
     author = {Mallol, Rafael},
     title = {Observaci\'on a un art{\'\i}culo del autor.},
     journal = {Collectanea mathematica},
     year = {1963},
     number = {1-2},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1963_1963_1_a0/}
}