Oonsivilai, R. , Chaijareonudomroung, N. , Huantanom, Y. , Oonsivilai, A. (2010). 'Extraction Condition of Echinocactus grusonii'. World Academy of Science, Engineering and Technology, Open Science Index 46, International Journal of Agricultural and Biosystems Engineering, 4(10), 721 - 724.