@article{RACSAM_2009_2009_1_a4,
     author = {Valdivia, M.},
     title = {On the ultradistributions of {Beurling} type.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales. Matem\'aticas},
     pages = {55-74},
     publisher = {mathdoc},
     volume = {103},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RACSAM_2009_2009_1_a4/}
}