TY - JOUR AU - T. A. Yakovleva TI - On the rigidity property of equilibrium positions of mechanical systems that depend on parameters JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1993 SP - 98 EP - 100 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1993_3_a21/ LA - ru ID - VMUMM_1993_3_a21 ER -