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@article{DAN_1985_283_4_a7, author = {A. M. Vinogradov and V. N. Gusyatnikova and V. A. Yumaguzhin}, title = {Secondary differential operators}, journal = {Doklady Akademii Nauk}, pages = {801--805}, publisher = {mathdoc}, volume = {283}, number = {4}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_4_a7/} }
A. M. Vinogradov; V. N. Gusyatnikova; V. A. Yumaguzhin. Secondary differential operators. Doklady Akademii Nauk, Tome 283 (1985) no. 4, pp. 801-805. http://geodesic.mathdoc.fr/item/DAN_1985_283_4_a7/