@article{MMO_1984_47_a6,
     author = {A. Ya. Helemskiǐ},
     title = {Flat {Banach} modules and amenable algebras},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {179--218},
     year = {1984},
     volume = {47},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1984_47_a6/}
}