F. Karim,  Synthesis of Dispersion-Compensating Triangular Lattice Index-Guiding Photonic Crystal Fibers Using the Directed Tabu Search Method.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 112(4). 697 - 700
    [viewed 26 February 2020]. Available from: https://publications.waset.org/pdf/10004078.