%0 Journal Article %A Henryk Iwaniec %T Small eigenvalues of Laplacian for $Γ_{0}(N)$ %J Acta Arithmetica %D 1990 %P 65-82 %V 56 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-56-1-65-82/ %R 10.4064/aa-56-1-65-82 %G en %F 10_4064_aa_56_1_65_82