@article{FPM_2006_12_1_a3,
     author = {M. D. Kovalev},
     title = {Some properties of rigidity mapping},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {129--142},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_1_a3/}
}