Buddhapala Wongkaew, Porntip Wongkaew, Panupong Thanutong, and ChitsanuphongThanutong, “NANOSTRUCTURAL CHARACTERIZATION OF GLUTATHIONE- S-TRANSFERASE IMMOBILIZING CHITOSAN MODIFIED SCREEN PRINTED CARBON ELECTRODE BY ATOMIC FORCE MICROSCOPY”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 14, no. 43, pp. 132–139, Mar. 2018.