A. R. Vazifedoost and  M. Rahgozar and  F. Oroumchian,  Using Automatic Ontology Learning Methods in Human Plausible Reasoning Based Systems.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2008, vol. 21(9). 3158 - 3165
    [viewed 21 October 2021]. Available from: https://publications.waset.org/pdf/4490.