Tibor Kulcsar and  Gabor Sarossy and  Gabor Bereznai and  Robert Auer and  Janos Abonyi,  Visualization and Indexing of Spectral Databases.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2012, vol. 67(7). 860 - 865
    [viewed 17 February 2020]. Available from: https://publications.waset.org/pdf/6292.