@article{MT_2004_7_2_a6,
     author = {V. A. Sharafutdinov},
     title = {Geometric {Symbol} {Calculusfor} {Pseudodifferential} {Operators.~I}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {159--206},
     year = {2004},
     volume = {7},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2004_7_2_a6/}
}