@article{1250127209,
author = {Erdos, Paul and Pomerance, Carl},
title = {On the normal number of prime factors of $\phi(n)$},
journal = {Rocky Mountain J. Math.},
volume = {15},
number = {4},
year = {1985},
pages = { 343-352},
language = {en},
url = {http://dml.mathdoc.fr/item/1250127209}
}
Erdos, Paul; Pomerance, Carl. On the normal number of prime factors of $\phi(n)$. Rocky Mountain J. Math., Tome 15 (1985) no. 4, pp. 343-352. http://gdmltest.u-ga.fr/item/1250127209/