@article{00856772,
title = {The triangular extensions of a generalized quadrangle of order },
journal = {Bulletin of the Belgian Mathematical Society - Simon Stevin},
volume = {2},
year = {1995},
pages = {509-518},
zbl = {0854.51005},
language = {en},
url = {http://dml.mathdoc.fr/item/00856772}
}
Pasechnik, Dmitrii V. The triangular extensions of a generalized quadrangle of order . Bulletin of the Belgian Mathematical Society - Simon Stevin, Tome 2 (1995) pp. 509-518. http://gdmltest.u-ga.fr/item/00856772/