@article{10_2140_agt_2001_1_709,
     author = {Okun, Boris},
     title = {Nonzero degree tangential maps between dual symmetric spaces},
     journal = {Algebraic and Geometric Topology},
     pages = {709--718},
     year = {2001},
     volume = {1},
     number = {2},
     doi = {10.2140/agt.2001.1.709},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2001.1.709/}
}