@article{1183422298,
author = {Williams, K. P.},
title = {The asymptotic form of the function $\Psi \left( x \right)$},
journal = {Bull. Amer. Math. Soc.},
volume = {20},
number = {3},
year = {1913},
pages = { 472-479},
language = {en},
url = {http://dml.mathdoc.fr/item/1183422298}
}
Williams, K. P. The asymptotic form of the function $\Psi \left( x \right)$. Bull. Amer. Math. Soc., Tome 20 (1913) no. 3, pp. 472-479. http://gdmltest.u-ga.fr/item/1183422298/