@article{FAA_1977_11_3_a17,
     author = {S. A. Rakov},
     title = {Ultraproducts and the ``three spaces problem''},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {88--89},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1977_11_3_a17/}
}