1. The Distribution of Prime Numbers;Ingham,1932
2. Sur la distribution des nombres premiers;Littlewood;Comptes Rendus Acad. Sci. Paris,1914
3. The Queen of Mathematics: An Introduction to Number Theory;Anglin,1995
4. Introduction to Analytic Number Theory;Apostol,1976
5. Unsolved Problems Concerning Primes;Hardy,1979