@Article{dwgrniscse07a,
  author =	 "S. Dworschak and S. Grell and V. Nikiforova and T. Schaub
                  and J. Selbig",
  title =	 "Modeling biological networks by action languages via answer
                  set programming",
  journal =	 "Constraints",
  year =	 2008,
  volume =	 13,
  number =	 "1-2",
  pages =	 "21-65"
}