@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/