TY  - JOUR
AU  - A. B. Venkov
TI  - Selberg's trace formula for the Hecke operator generated by an involution, and the eigenvalues of the Laplace--Beltrami operator on the fundamental domain of the modular group~$PSL(2,\mathbf Z)$
JO  - Izvestiya. Mathematics 
PY  - 1978
SP  - 448
EP  - 462
VL  - 12
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1978_12_3_a1/
LA  - en
ID  - IM2_1978_12_3_a1
ER  -