@article{MZM_1985_38_3_a11,
     author = {A. F. Solov'ev},
     title = {Curvature of a hyperdistribution and contact metric manifolds},
     journal = {Matemati\v{c}eskie zametki},
     pages = {450--462},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1985_38_3_a11/}
}