@article{RACSAM_2003_2003_1_a25,
     author = {Langenbruch, Michael},
     title = {Un teorema de aproximaci\'on general de tipo {Whitney.}},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales. Matem\'aticas},
     pages = {287-303},
     publisher = {mathdoc},
     volume = {97},
     number = {2},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RACSAM_2003_2003_1_a25/}
}