4. du Sautoy, Marcus, The Music of the Primes: Searching to Solve the Greatest Mystery in Mathematics. HarperCollins. 2003. ISBN 0-066-21070-4.
5. B. Riemann, “Ueber die Anzahl der Primzahlen unter einer gegebenen Grösse,” (“On the Number of Prime Numbers Less Than a Given Quantity”), Monatsberichte der Berliner Akademie (Monthly Review of the Berlin Academy), November 1859
6. Ramanujan wrote in his second letter to G. H. Hardy, dated 27 February 1913: "Dear Sir, I am very much gratified on perusing your letter of the 8th February 1913. I was expecting a reply from you similar to the one which a Mathematics Professor at London wrote asking me to study carefully Bromwich's Infinite Series and not fall into the pitfalls of divergent series. … I told him that the sum of an infinite number of terms of the series: 1 + 2 + 3 + 4 + · · · = −1/12 under my theory. If I tell you this you will at once point out to me the lunatic asylum as my goal. I dilate on this simply to convince you that you will not be able to follow my methods of proof if I indicate the lines on which I proceed in a single letter. …"
7. ఎరికలపూడి వాసుదేవరావు, “ఆచార్య సుబ్బరామన్ మీనాక్షీసుందరం,” ఈమాట అంతర్జాల పత్రిక, నవంబరు 2013
8. వేమూరి వేంకటేశ్వరరావు, “రీమాన్ శిష్టాభిప్రాయం,” ఈమాట అంతర్జాల పత్రిక, సెప్టెంబరు 2015
