@article{VMUMM_1999_1_a16,
     author = {T. A. Yakovleva},
     title = {Variational methods in the theory of rigidity of motion},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {66--67},
     publisher = {mathdoc},
     number = {1},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1999_1_a16/}
}