@article{IM_1982__66_142866,
     author = {Robert Connelly},
     title = {Rigidity and {Energy.}},
     journal = {Inventiones mathematicae},
     pages = {11--34},
     publisher = {mathdoc},
     volume = {66},
     year = {1982},
     zbl = {0485.52001},
     url = {http://geodesic.mathdoc.fr/item/IM_1982__66_142866/}
}