@unpublished{LiBleicherZhuetal.2007,
  author  = {Qingfeng Li and Marcus Bleicher and Xianglei Zhu and Horst St{\"o}cker},
  title   = {Transport model analysis of the transverse momentum and rapidity dependence of pion interferometry at SPS energies},
  institution = {Physik},
  year    = {2007},
}