Moree, Pieter Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.4064/aa163-1-2 (Publisher version)
Moree_Computing higher rank_oa_2014.pdf (Any fulltext), 336KB
Moree, P., & Stevenhagen, P. (2014). Computing higher rank primitive root densities. Acta Arithmetica, 163(1), 15-32. doi:10.4064/aa163-1-2.