Siriyong, Tutchawan, and Wirunya Keawwattana. 2012. “Utilization of Different Curing Systems and Natural Zeolite as Filler and Absorbent for Natural Rubber/Nitrile Rubber Blend”. Agriculture and Natural Resources 46 (6). Bangkok, Thailand:918-30. https://li01.tci-thaijo.org/index.php/anres/article/view/243006.