@article{UZKU_1969_129_3_a6,
     author = {S. I. Gorshin},
     title = {On the reduction principle in {Banach} spaces},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {89--97},
     publisher = {mathdoc},
     volume = {129},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1969_129_3_a6/}
}