@article{MZM_1984_35_1_a11,
     author = {A. F. Solov'ev},
     title = {Curvature of a distribution},
     journal = {Matemati\v{c}eskie zametki},
     pages = {111--124},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_1_a11/}
}