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@article{DE_1979_15_7_a18, author = {I. A. Shishmarev}, title = {The {Cauchy} problem for hypoelliptic systems and representation of the interaction}, journal = {Differencialʹnye uravneni\^a}, pages = {1337--1339}, publisher = {mathdoc}, volume = {15}, number = {7}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_7_a18/} }
I. A. Shishmarev. The Cauchy problem for hypoelliptic systems and representation of the interaction. Differencialʹnye uravneniâ, Tome 15 (1979) no. 7, pp. 1337-1339. http://geodesic.mathdoc.fr/item/DE_1979_15_7_a18/