@article{RRACEFN_1982_1982_1_a5,
     author = {Montesinos, V.},
     title = {Una nota sobre el teorema de {Krein.}},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     pages = {73-71},
     publisher = {mathdoc},
     volume = {76},
     number = {1},
     year = {1982},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1982_1982_1_a5/}
}