@article{INTG_1983_15_a2,
     author = {N. D. Polyakov},
     title = {Differential geometry of $f$-structure manifolds},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {95--125},
     publisher = {mathdoc},
     volume = {15},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1983_15_a2/}
}