Khampan, T. , Thavarungkul, N. , Tiansuwan, J. , Kamthai, S.. "Wet Strength Improvement of Pineapple Leaf Paper for Evaporative Cooling Pad". World Academy of Science, Engineering and Technology, Open Science Index 48, International Journal of Materials and Metallurgical Engineering, (2010), 4(12), 758 - 761.