1. L. Beneteau Topics about 3–Moufang loops and Hall triple systems, to appear.
2. Principles of Combinatorics.;Berge,1971
3. Characterization des espaces affine basée sur la notion de droit;Buekenhout;Math. Z.,1969
4. Extending symmetric designs;Cameron;J. Combin. Theory,1973
5. Two remarks on Steiner systems;Cameron;Geometriae Dedicata,1975