@InProceedings{hoffmann:nebel:ijcai-ws-01,
  author =       "J{\"o}rg Hoffmann and Bernhard Nebel",
  title =        "What Makes the Difference Between {HSP} and {FF}?",
  booktitle =    "Proceedings IJCAI-01 Workshop on Empirical Methods in Artificial Intelligence",
  year = "2001"
}