@article{VMUMM_1993_3_a21,
     author = {T. A. Yakovleva},
     title = {On the rigidity property of equilibrium positions of mechanical systems that depend on parameters},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {98--100},
     publisher = {mathdoc},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1993_3_a21/}
}