%0 Journal Article %A L. O. Chekhov %T A~spectral problem on graphs and $L$-functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1999 %P 1197-1232 %V 54 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1999_54_6_a2/ %G en %F RM_1999_54_6_a2