1. Pascal's theorem on an oval;Artzy;Amer. Math. Monthly,1968
2. Plans projetifs a ovoides pascaliens;Buekenhout;Arch. Math. (Basel),1966
3. Etude intrinseque des ovales;Buekenhout;Rend. Mat., (5),1966
4. Ovals et ovales projetifs;Buekenhout;Rend. Naz. Lincei, (8),1966
5. Characterizations of Semi Quadrics, A Survey;Buekenhout;Atti dei Convegni Lincei,1976