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References
Erdős, P. andShapiro, H. N., On the changes of sign of a certain error function,Canad. J. Math.,3 (1951), 375–385.
Hardy, G. H. andWright, E. M.,An introduction to the theory of numbers, Third Edition, Clarendon Press, 1954.
Pillai, S. S. andChowla, S. D., On the error terms in some asymptotic formulae in the theory of numbers,J. London Math. Soc.,5 (1930), 95–101.
Sitaramachandra Rao, S. andSuryanarayana, D., On the average order of the function\(E(x) = \Sigma _{n< x} \varphi (n) - \frac{3}{{\pi ^2 }}x^2 \),Arkiv för Matematik,10 (1972), 99–106.
Titchmarsh, E. C.,The theory of the Riemann zeta function, Clarendon Press, Oxford, 1951.
Walfisz, A.,Weylsche Exponentialsummen in der neueren Zahlentheorie, Math. Forschungsber. 15, V. E. B. Deutscher Verlag der Wiss., Berlin, 1963.
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Codecà, P. A note on Euler's ϕ-function. Ark. Mat. 19, 261–263 (1981). https://doi.org/10.1007/BF02384483
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DOI: https://doi.org/10.1007/BF02384483