%\BergerHR
\lref\BergerHR{
  C.~Berger {\it et al.}  [PLUTO Collaboration],
  %``JET PRODUCTION IN PHOTON-PHOTON INTERACTIONS,''
  Z.\ Phys.\  C {\bf 33}, 351 (1987).
  %%CITATION = ZEPYA,C33,351;%%
}