@inproceedings{
    Lehtimaki05a,
    author = {Lehtim{\"a}ki, Pasi and Raivio, Kimmo},
    title = "A {SOM} Based Approach for Visualization of {GSM} Network Performance Data",
    booktitle = "Proceedings of The 18th International Conference on Industrial \& Engineering Applications of Artificial Intelligence \& Expert Systems (IEA/AIE)",
    address = "Bari, Italy",
    month = "June 22 - 25",
    year = "2005",
    pages = "588-598"
}