@article{CLTM_1981_1981_1_a11,
     author = {Soler, F.},
     title = {r-y r2 variedades diferenciables.},
     journal = {Collectanea mathematica},
     pages = {245-274},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1981},
     zbl = {0519.53039},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1981_1981_1_a11/}
}