@article{GAMA_1961__13_5-6_43330,
     author = {E. F. G-Rodeja},
     title = {Derivaci\'on.},
     journal = {Gaceta Matem\'atica},
     pages = {123},
     publisher = {mathdoc},
     volume = {13},
     number = {5-6},
     year = {1961},
     language = {sp},
     url = {https://geodesic-test.mathdoc.fr/item/GAMA_1961__13_5-6_43330/}
}