%0 Journal Article %A V. P. Derevenskii %T Trigonometric solutions of nonlinear first-order ordinary differential equations over a~Banach algebra %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2011 %P 30-43 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2011_9_a3/ %G ru %F IVM_2011_9_a3