1. Symplectic geometry, quasigroups and Steiner systems;Bénétau,1986
2. A Survey of Binary Systems;Bruck,1958
3. Une caractérisation des espaces affins basée sur la notion de droite;Buekenhout;Math. Z.,1969
4. On the foundations of polar geometry;Buekenhout;Geom. Dedicata,1974
5. Parallelisms of Complete Designs;Cameron,1976