WASET
    Omid F. Valilai and  Mahmoud Houshmand,  LAYMOD; A Layered and Modular Platform for CAx Collaboration Management and Supporting Product data Integration based on STEP Standard.   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2011, vol. 54(6). 633 - 641
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/13314.