Johan Wall and  Johan Fredin and  Anders Jönsson and  Göran Broman,  Introductory Design Optimisation of a Machine Tool using a Virtual Machine Concept.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 2235 - 2240
    [viewed 15 April 2021]. Available from: https://publications.waset.org/pdf/3285.