Yoswathana, N. , Eshiaghi, M. , Jaturapornpanich, K. (2012). 'Enhancement of Essential Oil from Agarwood by Subcritical Water Extraction and Pretreatments on Hydrodistillation'. World Academy of Science, Engineering and Technology, Open Science Index 65, International Journal of Chemical and Molecular Engineering, 6(5), 459 - 465.