%0 Journal Article %A L. M. Fridman %T Application of the Boundary Function Method to Finding Slow Periodic Solutions of Singularly Perturbed Bang-Bang Systems %J Differencialʹnye uravneniâ %D 2003 %P 236-245 %V 39 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2003_39_2_a9/ %G ru %F DE_2003_39_2_a9