@unpublished{LiLiSoffetal.2006,
  author  = {Qingfeng Li and Zhuxia Li and Sven Soff and Marcus Bleicher and Horst St{\"o}cker},
  title   = {Medium modifications of the nucleon-nucleon elastic cross section in neutron-rich intermediate energy HICs},
  institution = {Physik},
  pages     = {14},
  year    = {2006},
}