@article{01678407,
title = {Nonzero degree tangential maps between dual symmetric spaces.},
journal = {Geometry \& Topology},
volume = {5},
year = {2001},
pages = {709-718},
doi = {10.2140/agt.2001.1.709},
zbl = {1066.53100},
language = {en},
url = {http://dml.mathdoc.fr/item/01678407}
}
Okun, Boris. Nonzero degree tangential maps between dual symmetric spaces.. Geometry & Topology, Tome 5 (2001) pp. 709-718. doi : 10.2140/agt.2001.1.709. http://gdmltest.u-ga.fr/item/01678407/