@article{MZ_1978__160_172676,
     author = {Wim H. Hesselink},
     title = {Polarization in the {Classical} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {217--234},
     publisher = {mathdoc},
     volume = {160},
     year = {1978},
     zbl = {0364.20048},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__160_172676/}
}