@article{DAN_1971_196_2_a15,
     author = {M. V. Fedoryuk},
     title = {Composition formulas for pseudodifferential operators and the stationary- phase method},
     journal = {Doklady Akademii Nauk},
     pages = {309--311},
     publisher = {mathdoc},
     volume = {196},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_196_2_a15/}
}