Ashraf M. Elsaid and  Magd M. Badr and  Mohamed S. Selim,  Environmental Friendly Polyurethane Coatings Based On Hyperbranched Resin.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2013, vol. 80(8). 597 - 603
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/16064.