@article{GDZPPN002097737, title = {Rigidity and Energy.}, journal = {Inventiones mathematicae}, volume = {69}, year = {1982}, pages = {11-34}, zbl = {0485.52001}, url = {http://dml.mathdoc.fr/item/GDZPPN002097737} }
Connelly, Robert. Rigidity and Energy.. Inventiones mathematicae, Tome 69 (1982) pp. 11-34. http://gdmltest.u-ga.fr/item/GDZPPN002097737/