@article{GDZPPN002084597,
title = {Blocking sets which are preserved by transitive collineation groups.},
journal = {Forum mathematicum},
volume = {4},
year = {1992},
pages = {567-592},
zbl = {0768.51008},
url = {http://dml.mathdoc.fr/item/GDZPPN002084597}
}
Biliotti, M.; Korchmaros, Gabor. Blocking sets which are preserved by transitive collineation groups.. Forum mathematicum, Tome 4 (1992) pp. 567-592. http://gdmltest.u-ga.fr/item/GDZPPN002084597/