1. G.D. Anderson, M.K. Vamanamurthy, M. Vuorinen, Conformal Invariants, Inequalities, and Quasiconformal Maps. Can. Math. Soc., Ser. Mon. Adv. Txt., Wiley, New York, 1997.
2. The Problems Submitted by Ramanujan, J. Indian Math. Soc;Berndt;Contemporary Math.,1999
3. The Riemann Zeta-Function;Karatsuba,1992
4. E.A. Karatsuba, On the computation of the Euler constant gamma, Numer. Algorithms 24 (2000) 83–97; and also in the Reports of the Department of Mathematics, University of Helsinki, Preprint 226, 1999.
5. E.A. Karatsuba, On the asymptotic representation of the Euler gamma function by Ramanujan Report of Dept. of Mathmatics, Univ. of Helsinbi, Preprint 248, 1999.