1. On the complexity and combinatorics of covering finite complexes;Abello;Australasian J. Combin.,1991
2. Local and global properties in networks of processors;Angluin;Proc. STOC,1980
3. Perfect codes in graphs;Biggs;J. Combin. Theory Ser. B,1973
4. Algebraic Graph Theory;Biggs,1974
5. Distance-Regular Graphs;Brouwer,1989