@article{10_4064_aa138_4_6,
     author = {Takashi Nakamura},
     title = {The joint universality and
 the generalized strong recurrence for {Dirichlet} $L$-functions},
     journal = {Acta Arithmetica},
     pages = {357--362},
     publisher = {mathdoc},
     volume = {138},
     number = {4},
     year = {2009},
     doi = {10.4064/aa138-4-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa138-4-6/}
}