TY - JOUR AU - I. V. Zakalyukin TI - Singularities of control systems under degeneration of non-holonomic constraints JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2010 SP - 791 EP - 793 VL - 65 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_2010_65_4_a9/ LA - en ID - RM_2010_65_4_a9 ER -