F. A. Azri, R. Sukor, R. Hajian, N. A. Yusof, F. Abu Bakar, and J. Selamat, “Modification Strategy of Screen-Printed Carbon Electrode with Functionalized Multi-Walled Carbon Nanotube and Chitosan Matrix for Biosensor Development”, ajc, vol. 29, no. 1, pp. 31–36, Oct. 2016.