Pawalai Kraipeerapun and  Chun Che Fung and  Kok Wai Wong,  Lithofacies Classification from Well Log Data Using Neural Networks, Interval Neutrosophic Sets and Quantification of Uncertainty.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2008, vol. 23(11). 3937 - 3941
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/13852.