@article{DAN_1957_117_4_a1, author = {V. M. Borok}, title = {Equivalent systems of linear partial differential equations with constant coefficients}, journal = {Doklady Akademii Nauk}, pages = {555--558}, publisher = {mathdoc}, volume = {117}, number = {4}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_4_a1/} }