Purnomo Yustianto and  Robin Doss,  Metamodel for Artefacts in Service Engineering Analysis and Design .   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2018, vol. 141(9). 674 - 686
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10009469.