Chaichan, Miqdam T., et al. “The Influence of Graphene Oxide Addition on The Fortified Nitrile Butadiene Rubber Nano-Composite Qualities”. Al-Nahrain Journal for Engineering Sciences, vol. 20, no. 4, Aug. 2017, pp. 904-10, https://nahje.com/index.php/main/article/view/315.