WASET
    Taisir Eldos and  Aws Kanan and  Waleed Nazih and  Ahmad Khatatbih,  Adapting the Chemical Reaction Optimization Algorithm to the Printed Circuit Board Drilling Problem.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 97(1). 247 - 252
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10000398.