Generalized Steiner Systems GS(2, 4, v, 2) with a Prime Power equiv 7 (mod 12).

D. Wu L. Zhu Generalized Steiner Systems GS(2, 4, v, 2) with a Prime Power equiv 7 (mod 12). 69-80 2001 24 Des. Codes Cryptography 1 db/journals/dcc/dcc24.html#WuZ01