1. The distance-regular antipodal covers of classical distance-regular graphs;van Bon,1987
2. The distance-regular antipodal covers of classical distance-regular graphs;van Bon,1988
3. Graph Theory With Applications;Bondy,1976
4. Distance-regular Graphs;Brouwer,1987
5. On Generalized Hexagons and Near Octagon whose Lines have Three Points;Cohen;Europ. J. Combin.,1985