TY - JOUR AU - R. R. Gontsov AU - V. A. Poberezhnyi AU - G. F. Helminck TI - On deformations of linear differential systems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2011 SP - 63 EP - 105 VL - 66 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_2011_66_1_a2/ LA - en ID - RM_2011_66_1_a2 ER -