@article{GAMA_1975_1975_1_a11,
     author = {Le\'on \'Alvarez, J.},
     title = {Operadores de derivaci\'on y diferenciaci\'on en m\'odulos.},
     journal = {Gaceta matem\'atica},
     pages = {130-135},
     publisher = {mathdoc},
     volume = {27},
     number = {5-6},
     year = {1975},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1975_1975_1_a11/}
}