@article{oai:tsukuba.repo.nii.ac.jp:00017254,
 author = {Mikawa, Hiroshi},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {121--153},
 title = {On primes in arithmetic progressions},
 volume = {25},
 year = {2001}
}