@article{INTG_1977_8_a4,
     author = {N. M. Ostianu},
     title = {Differential-geometric structures on differentiable manifolds},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {89--111},
     publisher = {mathdoc},
     volume = {8},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1977_8_a4/}
}