Yongxian Jin and  Jingzhou Huang,  Analysis and Research of Two-Level Scheduling Profile for Open Real-Time System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 772 - 779
    [viewed 20 January 2020]. Available from: https://publications.waset.org/pdf/6115.