J. Mongkolkajit, J. Pullsirisombat, S. Prichanont, V. Tantayakom, P. Prasitchoke, and M. Phisalaphong, “γ-Alumina Doped Alginate Gel for Cell Immobilization in Fermentation Processes”, ASEAN J. Chem. Eng., vol. 10, no. 1, pp. 1-7, Dec. 2010.