@article{INTD_1973_1_a4,
     author = {V. P. Maslov and B. Yu. Sternin},
     title = {The canonical operator (the complex case)},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {169--195},
     year = {1973},
     volume = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1973_1_a4/}
}