TY - JOUR AU - Ya. Tatarinov TI - Approximate form of reachable sets after perturbation of Liouville systems JO - Theoretical and applied mechanics PY - 1982 SP - 133 VL - 8 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TAM_1982_8_1_a15/ LA - en ID - TAM_1982_8_1_a15 ER -