Transverse quadruple systems with five holes, M. S. Keranen, D. L. Kreher
Michigan Tech Publications

3-designs of PSL(2,2 < sup> n ) with block sizes 4 and 5, M. S. Keranen, D. L. Kreher
Michigan Tech Publications

Quadruple systems of the projective special linear group PSL(2,q), q = 1 (mod 4), M. S. Keranen, D. L. Kreher, P. J.S. Shiue
Michigan Tech Publications