Hardy, G. H.; Littlewood, J. E. (1916). «Contributions to the Theory of the Riemann Zeta-Function and the Theory of the Distribution of Primes». Acta Mathematica41 (1): 119-196. doi:10.1007/BF02422942.(See notes therein for further references to Cahen's and Mellin's work, including Cahen's thesis.)
