Dębek, C., and J. Magryta. “Influence of Oil Adsorption on the Dynamic Properties of Vulcanates of Natural Rubber and Natural rubber/Butadiene-Acrylonitrile Mixtures”. Polimery, vol. 55, no. 3, Mar. 2010, pp. 201-7, http://ichp.vot.pl/index.php/p/article/view/1002.