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@article{FAA_1969_3_3_a3, author = {Yu. V. Egorov}, title = {Bounds for differential operators of the first order}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {53--60}, publisher = {mathdoc}, volume = {3}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1969_3_3_a3/} }
Yu. V. Egorov. Bounds for differential operators of the first order. Funkcionalʹnyj analiz i ego priloženiâ, Tome 3 (1969) no. 3, pp. 53-60. http://geodesic.mathdoc.fr/item/FAA_1969_3_3_a3/