@article{INTG_1983_14_a1,
     author = {N. D. Polyakov},
     title = {Classification of $(f\xi\eta\rho)$-structures},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {57--72},
     year = {1983},
     volume = {14},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1983_14_a1/}
}