@inproceedings{Beierle91,
    AUTHOR = "C. Beierle",
    TITLE = "An Overview on Planning Applications in {PROTOS-L}",
    BOOKTITLE = "Proceedings 13th IMACS World Congress on Computation and
                 Applied Mathematics",
    YEAR = 1991,
    EDITOR = "R. Vichnevetsky and J. H. Miller",
    PAGESwhere = "1753--1755",
    PUBLISHERwho = {nn},
    ADDRESS = {Dublin, Ireland},
    MONTH = "July",
    NOTEold = "(to appear)" }