Saeed Mohammed Baneamoon and  Rosalina Abdul Salam,  Enhancement Approaches for Supporting Default Hierarchies Formation for Robot Behaviors.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2009, vol. 26(2). 271 - 275
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/12460.