WASET
    Gianpaolo Ghiani and  Emanuela Guerriero and  Emanuele Manni and  Alessandro Romano,  Joint Training Offer Selection and Course Timetabling Problems: Models and Algorithms.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2015, vol. 103(7). 1724 - 1729
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10002234.