@misc {IOPORT.70894740,
    author       = {Krahl, David},
    title        = {Extend: the extend simulation environment},
    howpublished = {Winter Simulation Conference, 205-213 (2002).},
    year         = {2002},
    doi          = {10.1145/1030453.1030483},
    identifier   = {70894740},
}