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@article{MS_1950__69_1_a9, author = {{\CYRA}.{\CYRN}. {\CYRT}{\cyri}{\cyrh}{\cyro}{\cyrn}{\cyro}{\cyrv}}, title = {{\CYRO} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrh} {\cyrd}{\cyri}{\cyrf}{\cyrf}{\cyre}{\cyrr}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt}, {\cyrs}{\cyro}{\cyrd}{\cyre}{\cyrr}{\cyrzh}{\cyra}{\cyrshch}{\cyri}{\cyrh} {\cyrp}{\cyra}{\cyrr}{\cyra}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyrery}}, journal = {Matemati\v{c}eskij sbornik}, pages = {147--156}, publisher = {mathdoc}, volume = {69}, number = {1}, year = {1950}, zbl = {0041.42316}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1950__69_1_a9/} }
А.Н. Тихонов. О системах дифференциальных уравнений, содержащих параметры. Matematičeskij sbornik, Tome 69 (1950) no. 1, pp. 147-156. http://geodesic.mathdoc.fr/item/MS_1950__69_1_a9/