%0 Journal Article %A V. I. Mironenko %T On periodic solutions of Riccati equations %J Problemy fiziki, matematiki i tehniki %D 2015 %P 62-64 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PFMT_2015_2_a9/ %G ru %F PFMT_2015_2_a9