Estimates of Petersson’s inner squares of cusp forms and arithmetic applications. (English. Russian original) Zbl 0719.11027
J. Sov. Math. 53, No. 3, 323-338 (1991); translation from Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 168, 158-179 (1988).