@article{GAMA_1975_1975_1_a7,
     author = {Mira Ros, Jos\'e Manuel},
     title = {Sobre distintas definiciones del {"Numero} {Natural".}},
     journal = {Gaceta matem\'atica},
     pages = {92-99},
     publisher = {mathdoc},
     volume = {27},
     number = {3-4},
     year = {1975},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1975_1975_1_a7/}
}