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@article{DAN_1965_163_2_a0, author = {I. V. Gel'man}, title = {On stable solvable extensions of partial differential operators}, journal = {Doklady Akademii Nauk}, pages = {279--281}, publisher = {mathdoc}, volume = {163}, number = {2}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_163_2_a0/} }
I. V. Gel'man. On stable solvable extensions of partial differential operators. Doklady Akademii Nauk, Tome 163 (1965) no. 2, pp. 279-281. http://geodesic.mathdoc.fr/item/DAN_1965_163_2_a0/