@unpublished{LiLiZhaoetal.2005,
  author  = {Qingfeng Li and Zhuxia Li and Enguang Zhao and Horst St{\"o}cker},
  title   = {Re-visit the N/Z ratio of free nucleons from collisions of neutron-rich nuclei as a probe of EoS of asymmetric nuclear matter},
  institution = {Physik},
  year    = {2005},
}