@article{RMC_2009_2009_1_a15,
     author = {Katsoprinakis, Emmanuel S.},
     title = {Coincidence of some classes of universal functions.},
     journal = {Revista matem\'atica complutense},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMC_2009_2009_1_a15/}
}