@article{01748369, title = {Exotic smooth structures on nonpositively curved symmetric spaces.}, journal = {Geometry \& Topology}, volume = {6}, year = {2002}, pages = {381-389}, doi = {10.2140/agt.2002.2.381}, zbl = {0998.53033}, language = {en}, url = {http://dml.mathdoc.fr/item/01748369} }
Okun, Boris. Exotic smooth structures on nonpositively curved symmetric spaces.. Geometry & Topology, Tome 6 (2002) pp. 381-389. doi : 10.2140/agt.2002.2.381. http://gdmltest.u-ga.fr/item/01748369/