@incollection{berry:1998:hrz,
    author = {Berry, M. V. and Keating, J. P.},
     title = {$H = xp$ and the {R}iemann Zeros},
 booktitle = {Supersymmetry and Trace Formulae: Chaos and Disorder},
    editor = {Lerner, I. V. and Keating, J. P. and Khmelnitskii, D. E.},
 publisher = {Plenum},
   address = {New York},
      year = {1998},
     pages = {355–367},
      isbn = {0306459337}}