@article{PM_1992_1992_1_a45,
     author = {G\'omez, Jos\'e and Torrecillas, Blas},
     title = {Anillos {FTF} por la izquierda fuertemente graduados.},
     journal = {Publicacions matem\`atiques},
     pages = {609-623},
     publisher = {mathdoc},
     volume = {36},
     number = {2A},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1992_1992_1_a45/}
}