WASET
    Zoltan Theisz and  Gergely Mezei,  Multi-Level Meta-Modeling for Enabling Dynamic Subtyping for Industrial Automation.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 121(1). 86 - 90
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10006273.