@article{EXMATH_1991_1991_1_a26,
     author = {Gonz\'alez, Manuel and Martin\'on, Antonio},
     title = {Sobre cantidades operacionales y el espectro de isometr{\'\i}a de {Mil'man.}},
     journal = {Extracta mathematicae},
     pages = {129-131},
     publisher = {mathdoc},
     volume = {6},
     number = {2-3},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1991_1991_1_a26/}
}