W. Muangrat, P. Artsamai, M. Phonyiem, S. Ichikawa, and W. Wongwiriyapan, “Paper-based Volatile Organic Compound Sensor using MultiWalled Carbon Nanotubes on a Polytetrafluoroethylene Membrane”, Thai J. Nanosci. Nanotechnol., vol. 3, no. 2, pp. 35–41, Dec. 2018.