TY - JOUR AU - Yu. L. Sachkov TI - Maxwell strata and symmetries in the problem of optimal rolling of a~sphere over a~plane JO - Sbornik. Mathematics PY - 2010 SP - 1029 EP - 1051 VL - 201 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2010_201_7_a4/ LA - en ID - SM_2010_201_7_a4 ER -