%0 Journal Article
%A V. V. Golovchanskii
%T Asymptotic behaviour of the~spectral function of the~Laplace--Beltrami operator for cocompact discrete subgroups of $\operatorname {SL}_2(\mathbb R)$
%J Sbornik. Mathematics
%D 1998
%P 977-990
%V 189
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1998_189_7_a1/
%G en
%F SM_1998_189_7_a1