@article{10_4064_aa167_2_1,
     author = {Takuya Okamoto and Tomokazu Onozuka},
     title = {On various mean values of {Dirichlet} $L$-functions},
     journal = {Acta Arithmetica},
     pages = {101--115},
     publisher = {mathdoc},
     volume = {167},
     number = {2},
     year = {2015},
     doi = {10.4064/aa167-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa167-2-1/}
}