@article{MZM_1974_15_5_a14,
     author = {M. V. Karasev},
     title = {Calculus of ordered operators on a~factor algebra},
     journal = {Matemati\v{c}eskie zametki},
     pages = {775--786},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a14/}
}