WASET
    M. Javadzadeh and  H. Khoshsima,  Experimental Study of Tunable Layout Printed Fresnel Lens Structure Based on Dye Doped Liquid Crystal.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2018, vol. 138(6). 249 - 252
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10009033.