@article{bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-4-7,
author = {Florian Luca and Igor E. Shparlinski},
title = {Average multiplicative orders of elements modulo n},
journal = {Acta Arithmetica},
volume = {108},
year = {2003},
pages = {387-411},
zbl = {1043.11067},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-4-7}
}
Florian Luca; Igor E. Shparlinski. Average multiplicative orders of elements modulo n. Acta Arithmetica, Tome 108 (2003) pp. 387-411. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-4-7/