J. Mongkolkajit, J. Pullsirisombat, S. Prichanont, V. Tantayakom, P. Prasitchoke, dan M. Phisalaphong, “γ-Alumina Doped Alginate Gel for Cell Immobilization in Fermentation Processes”, vol. 10, no. 1, hlm. 1-7, Des 2010.