@article{GAMA_1967_1967_1_a0,
     author = {Del Castillo Ab\'anades, Florencio},
     title = {Transformaci\'on contractiva y teoremas de existencia.},
     journal = {Gaceta matem\'atica},
     pages = {3-10},
     publisher = {mathdoc},
     volume = {19},
     number = {1-2},
     year = {1967},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1967_1967_1_a0/}
}