K. A. Weidenmann and  M. Grigo and  B. Brylka and  P. Elsner and  T. Böhlke,  Time Temperature Dependence of Long Fiber Reinforced Polypropylene Manufactured by Direct Long Fiber Thermoplastic Process.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2017, vol. 121(1). 13 - 18
    [viewed 13 November 2019]. Available from: https://publications.waset.org/pdf/10005992.