Widanarto, W., F. Abdullatif, C. Senft, and W. Hansch. “Effect of Annealed Si/Ti/Pt Hetero Structure on The Response Time and Signals of Hydrogen Sensors”. Indonesian Journal of Physics, Vol. 22, no. 1, Nov. 2016, pp. 17-21, doi:10.5614/itb.ijp.2011.22.1.3.