@article{01730446,
title = {Hyperplanes of dual polar spaces of rank 3 with no subquadrangular quad.},
journal = {Advances in Geometry},
volume = {2},
year = {2002},
pages = {107-122},
doi = {10.1515/advg.2002.001},
zbl = {0997.51002},
language = {en},
url = {http://dml.mathdoc.fr/item/01730446}
}
Pralle, Harm. Hyperplanes of dual polar spaces of rank 3 with no subquadrangular quad.. Advances in Geometry, Tome 2 (2002) pp. 107-122. doi : 10.1515/advg.2002.001. http://gdmltest.u-ga.fr/item/01730446/