@article{RMI_2005_2005_1_a9,
     author = {Fabian, M. and H\'ajek, P. and Montesinos, V. and Zizler, V.},
     title = {Una versi\'on cuantitativa del teorema de {Krein.}},
     journal = {Revista matem\'atica iberoamericana},
     pages = {237-248},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2005_2005_1_a9/}
}