@article{CLTM_1984_1984_1_a1,
     author = {Peralta, Javier},
     title = {Sobre las derivadas graduadas.},
     journal = {Collectanea mathematica},
     pages = {189-205},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1984_1984_1_a1/}
}