@article{DBLP:journals/tplp/FichteTW15,
  author = {Fichte, Johannes Klaus and Truszczynski, Miroslaw and Woltran, Stefan},
  title = {Dual-normal logic programs - the forgotten class},
  journal = {{TPLP}},
  volume = {15},
  number = {4-5},
  pages = {495--510},
  year = {2015}
}