P. H. Fisher, Tim Penttila, Gordon F. Royle. Symmetric designs, polarities and sub-designs. Discrete Mathematics, 71(1):19-32, 1988. [doi]
@article{FisherPR88,
title = {Symmetric designs, polarities and sub-designs},
author = {P. H. Fisher and Tim Penttila and Gordon F. Royle},
year = {1988},
doi = {10.1016/0012-365X(88)90027-1},
url = {http://dx.doi.org/10.1016/0012-365X(88)90027-1},
researchr = {https://researchr.org/publication/FisherPR88},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {71},
number = {1},
pages = {19-32},
}