N. Samarinas and  C. Evangelides and  C. Vrekos,  Comparison of Different Methods to Produce Fuzzy Tolerance Relations for Rainfall Data Classification in the Region of Central Greece.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2018, vol. 134(2). 139 - 143
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/10008676.