Sri Hartati and 1Agus Harjoko and  Brad G. Nickerson,  Fuzzy Hyperbolization Image Enhancement and Artificial Neural Network for Anomaly Detection.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 32(8). 2089 - 2092
    [viewed 27 January 2020]. Available from: https://publications.waset.org/pdf/10633.