@article{GAMA_1973_1973_1_a12,
     author = {Zorio Blanco, Valeriano},
     title = {Introducci\'on al espacio proyectivo.},
     journal = {Gaceta matem\'atica},
     pages = {146-171},
     publisher = {mathdoc},
     volume = {25},
     number = {5-6},
     year = {1973},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1973_1973_1_a12/}
}