@article{GAMA_1964_1964_1_a5,
     author = {P\'erez De Madrid, Aquilino },
     title = {Diferencial coordenada de una curva.},
     journal = {Gaceta matem\'atica},
     pages = {88-96},
     publisher = {mathdoc},
     volume = {16},
     number = {3-4},
     year = {1964},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1964_1964_1_a5/}
}