@book{sommerfeld:1928:as,
    author = {Sommerfeld, A.},
     title = {{A}tombau und {S}pektrallinien},
 publisher = {Vieweg},
   address = {Braunschweig},
      year = {1928},
      note = {English translation: {\emph{Wave Mechanics}} published
              by Methuen, London, 1930.},
     zblno = {55.1173.02}}