@unpublished{ZschiescheSchrammSchaffnerBielichetal.2005,
  author  = {Detlef Zschiesche and Stefan Schramm and J{\"u}rgen Schaffner-Bielich and Horst St{\"o}cker and Walter Greiner},
  title   = {Particle ratios at RHIC : effective hadron masses and chemical freeze-out},
  institution = {Physik},
  year    = {2005},
}