%0 Journal Article %A van Dam, Edwin R. %T Bounds on special subsets in graphs, eigenvalues and association schemes %J Journal of Algebraic Combinatorics %D 1998 %P 321-332 %V 7 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JAC_1998__7_3_a0/ %G en %F JAC_1998__7_3_a0