@article{01928906, title = {Differentiability and rigidity theorems.}, journal = {Annales Academiae Scientiarum Fennicae. Mathematica}, volume = {27}, year = {2002}, pages = {221-230}, zbl = {1021.30046}, language = {en}, url = {http://dml.mathdoc.fr/item/01928906} }
Chen, Min. Differentiability and rigidity theorems.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 27 (2002) pp. 221-230. http://gdmltest.u-ga.fr/item/01928906/