@article{INTF_1986_9_a5,
     author = {A. E. Tumanov},
     title = {The geometry of $CR$-manifolds},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya},
     pages = {225--246},
     year = {1986},
     volume = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTF_1986_9_a5/}
}