@article{05274262,
title = {Primes in classes of the iterated totient function.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {11},
year = {2008},
zbl = {1146.11002},
language = {en},
url = {http://dml.mathdoc.fr/item/05274262}
}
Noe, Tony D. Primes in classes of the iterated totient function.. Journal of Integer Sequences [electronic only], Tome 11 (2008) . http://gdmltest.u-ga.fr/item/05274262/