@article{01644412,
title = {SPG systems and semipartial geometries.},
journal = {Advances in Geometry},
volume = {1},
year = {2001},
pages = {229-244},
doi = {10.1515/advg.2001.015},
zbl = {0985.51006},
language = {en},
url = {http://dml.mathdoc.fr/item/01644412}
}
Thas, J.A. SPG systems and semipartial geometries.. Advances in Geometry, Tome 1 (2001) pp. 229-244. doi : 10.1515/advg.2001.015. http://gdmltest.u-ga.fr/item/01644412/