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@article{PFMT_2010_1_a3, author = {E. V. Varenikova}, title = {Time symmetries of two dimensial nonautounomous differential systems}, journal = {Problemy fiziki, matematiki i tehniki}, pages = {22--24}, publisher = {mathdoc}, number = {1}, year = {2010}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/PFMT_2010_1_a3/} }
E. V. Varenikova. Time symmetries of two dimensial nonautounomous differential systems. Problemy fiziki, matematiki i tehniki, no. 1 (2010), pp. 22-24. http://geodesic.mathdoc.fr/item/PFMT_2010_1_a3/