Nedeljko Cvejic and  Artur Łoza and  David Bull and  Nishan Canagarajah,  A Similarity Metric for Assessment of Image Fusion Algorithms.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 2826 - 2830
    [viewed 13 October 2019]. Available from: https://publications.waset.org/pdf/1046.