@article{dirichlet:1849:ubm,
    author = {Dirichlet, P. G. L.},
     title = {{\"U}ber die {B}estimmung der mittleren {W}erthe in der
              {Z}ahlentheorie},
   journal = {Abhandlungen der K\"oniglich Preussischen Akademie der
              Wissenschaften von 1849},
      year = {1849},
  language = {German},
     pages = {69–83},
      note = {Reprinted in G. Lejeune Dirichlet's {W}erke, {B}and {II},
              pp. 49–66, Reimer, Berlin, 1897 and with corrections in
              G. Lejeune Dirichlet's {W}erke, AMS Chelsea Publishing Series,
              Providence, RI, 1969.},
  mrnumber = {MR0249268 (40 \#2514)},
      isbn = {0-8284-0225-6},
       url = {http://gallica.bnf.fr/scripts/ConsultationTout.exe?O=99436}}