@article{SIGMA_2009_5_a77,
     author = {Laurent Manivel},
     title = {On {Spinor} {Varieties} and {Their} {Secants}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2009},
     volume = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a77/}
}