On Subdesigns of Symmetric Designs.
On Difference Matrices, Resolvable Transversal Designs and Generalized Hadamard Matrices.
Symmetric translation nets.
Einige einfache fahnenhomogene 3-Blockpläne.
Simple quasidoubles of projective planes.
Variations on seven points: An introduction to the scope and methods of coding theory and finite geometries.
Another case of the prime power conjecture for finite projective planes.
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