Affine Rank 3 Groups on Symmetric Designs.

Ulrich Dempwolff Affine Rank 3 Groups on Symmetric Designs. 159-168 2004 31 Des. Codes Cryptography 2 http://dx.doi.org/10.1023/B:DESI.0000012444.37411.1c db/journals/dcc/dcc31.html#Dempwolff04