Lang, W., P. Buakaew, W. Buranaporipan, J. Wongchawalit, N. Sakairi, W. Vanichsriratana, and S. Sirisansaneeyakul. “Biosorption of Local Textile Dyes Onto Acid-Tolerant Macro-Beads of Chitosan-Immobilized Rhizopus arrhizus Biomass”. Agriculture and Natural Resources, vol. 47, no. 1, Feb. 2013, pp. 101-14, https://li01.tci-thaijo.org/index.php/anres/article/view/243034.