@article{RM_1966_21_2_a2,
     author = {S. G. Krein and Yu. I. Petunin},
     title = {Scales of {Banach} spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {85--159},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1966},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1966_21_2_a2/}
}