WASET
    Arne Koschel,  Event Monitoring Based On Web Services for Heterogeneous Event Sources.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 101(5). 1082 - 1086
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/10001168.