WASET
    Vasile Marinescu and  Ionut Clementin Constantin and  Alexandru Epureanu and  Virgil Teodor,  Graphical Programming of Programmable Logic Controllers -Case Study for a Punching Machine-.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 1169 - 1173
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/2321.