M. Kheirandish and  S. Borhani,  Green Prossesing of PS/Nanoparticle Fibers and Studying Morphology and Properties .   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2014, vol. 87(3). 192 - 195
    [viewed 08 April 2020]. Available from: https://publications.waset.org/pdf/9997621.