WASET
    H. Lang and  M. Bader and  A. Buchroithner,  A Holistic Approach for Technical Product Optimization.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2016, vol. 109(1). 26 - 31
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10003279.