TY - JOUR AU - B. S. Kalitin TI - Instability of Closed Invariant Sets of Semidynamical Systems. Method of Sign-Constant Lyapunov Functions JO - Matematičeskie zametki PY - 2009 SP - 382 EP - 394 VL - 85 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2009_85_3_a6/ LA - ru ID - MZM_2009_85_3_a6 ER -