1. Apostol, T.M.: Introduction to Analytic Number Theory. Springer, New York (1976)
2. Axler, C.: New bounds for the prime counting function $$\pi (x)$$ π ( x ) . arXiv: 1409.1780 (2014)
3. Berkane, D., Dusart, P.: On a constant related to the prime counting function. Mediterr. J. Math. 13(3), 929–938 (2016). doi: 10.1007/s00009-015-0564-9
4. Cesaro, E.: Sur une formule empirique de M. Pervouchine. Comptes Rendus hebdo. des Séances de l’Académie des Sciences CXIX 119, 848–849 (1894)
5. Cipolla, M.: La determinazione assintotica dell’ $$n^{imo}$$ n i m o numero primo. Rend. Acad. Sci. Fis. Mat. Napoli 8, 132–166 (1902)