Cameron, P. J.; Goethals, J. M.; Seidel, J. J.; Shult, E. E. Line graphs, root systems, and elliptic geometry. (English) Zbl 0337.05142 J. Algebra 43, 305-327 (1976). MSC: 05C99 05B05 51M20 20H15 × Cite Format Result Cite Review PDF Full Text: DOI
Seidel, J. J. Strongly regular graphs with (-1, 1, 0) adjacency matrix having eigenvalue 3. (English) Zbl 0159.25403 Linear Algebra Appl. 1, 281-298 (1968). × Cite Format Result Cite Review PDF Full Text: DOI