@article{SM_1991_68_2_a10,
     author = {A. Ya. Helemskii},
     title = {The homological essence of {Connes} amenability: injectivity of the predual bimodule},
     journal = {Sbornik. Mathematics},
     pages = {555--566},
     publisher = {mathdoc},
     volume = {68},
     number = {2},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1991_68_2_a10/}
}