@inproceedings{
    NR92:kr,
    author = {Niemel{\"a}, Ilkka and Rintanen, J.},
    publisher = "Morgan Kaufmann Publishers",
    title = "On the Impact of Stratification on the Complexity of Nonmonotonic Reasoning",
    booktitle = "Proceedings of the 3rd International Conference on Principles of Knowledge Representation and Reasoning",
    address = "Cambridge, MA, USA",
    month = "October",
    year = "1992",
    organization = "",
    pages = "627--638"
}