@article{GRSME_2000_2000_1_a4,
     author = {Arias de Reyna, J.},
     title = {Complejidad de los n\'umeros naturales.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {230-250},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2000},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_2000_2000_1_a4/}
}