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@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/} }
A. F. Solov'ev. Curvature of a distribution. Matematičeskie zametki, Tome 35 (1984) no. 1, pp. 111-124. http://geodesic.mathdoc.fr/item/MZM_1984_35_1_a11/