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@article{DAN_1990_314_1_a37, author = {Yu. A. Chirkunov}, title = {Group classification of systems of first-order linear differential}, journal = {Doklady Akademii Nauk}, pages = {155--159}, publisher = {mathdoc}, volume = {314}, number = {1}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a37/} }
Yu. A. Chirkunov. Group classification of systems of first-order linear differential. Doklady Akademii Nauk, Tome 314 (1990) no. 1, pp. 155-159. http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a37/