Nathar Shah and  Visham Cheerkoot,  CScheme in Traditional Concurrency Problems.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 715 - 721
    [viewed 18 January 2022]. Available from: https://publications.waset.org/pdf/7402.