@article{MAT_1960_4_1_a4,
     author = {N. Dunford},
     title = {A survey of the theory of spectral operators},
     journal = {Matematika},
     pages = {53--100},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1960_4_1_a4/}
}