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@article{DAN_1984_276_6_a5, author = {N. G. Marchuk}, title = {On a method of reducing the wave equation to a system of first order equations}, journal = {Doklady Akademii Nauk}, pages = {1309--1311}, publisher = {mathdoc}, volume = {276}, number = {6}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1984_276_6_a5/} }
N. G. Marchuk. On a method of reducing the wave equation to a system of first order equations. Doklady Akademii Nauk, Tome 276 (1984) no. 6, pp. 1309-1311. http://geodesic.mathdoc.fr/item/DAN_1984_276_6_a5/