@article{FAA_1972_6_4_a21,
     author = {Ya. G. Sinai and A. Ya. Helemskii},
     title = {Description of differentiations in algebras of the type of locally observable spin system algebras},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {99--100},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1972_6_4_a21/}
}