@article{01701489,
title = {Perp-systems and partial geometries.},
journal = {Advances in Geometry},
volume = {2},
year = {2002},
pages = {1-12},
doi = {10.1515/advg.2001.025},
zbl = {0988.51006},
language = {en},
url = {http://dml.mathdoc.fr/item/01701489}
}
De Clerck, Frank; Delanote, Mario; Hamilton, Nicholas; Mathon, Rudolf. Perp-systems and partial geometries.. Advances in Geometry, Tome 2 (2002) pp. 1-12. doi : 10.1515/advg.2001.025. http://gdmltest.u-ga.fr/item/01701489/