3 citations to https://www.mathnet.ru/eng/dan37177

1. A. F. Leont'ev, “On quasianalytic noncontinuability of a function given by a series of exponentials”, Math. USSR-Izv., 30:2 (1988), 245–261        
2. V. S. Vladimirov, S. M. Nikol'skii, Yu. N. Frolov, “Aleksei Fedorovich Leont'ev (on his sixtieth birthday)”, Russian Math. Surveys, 32:3 (1977), 131–144        
3. Z. Sh. Karimov, “On an estimate for a function represented by a Dirichlet series”, Math. USSR-Sb., 25:4 (1975), 525–532