Rumena D. Stancheva and  Ilona I. Iatcheva,  A Statistical Identification Approach by the Boundary Field Changes.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2010, vol. 42(6). 745 - 750
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/5015.