Ahmmad, B., et al. “Effect of Single Walled Carbon Nanotube As Counter Electrode on Laser-Deposited Fe<sub>2< sub>O<sub>3< sub> and TiO<sub>2< Sub> Films Solar Cells”. Journal of Scientific Research, vol. 1, no. 3, Aug. 2009, pp. 430-7, doi:10.3329/jsr.v1i3.2631.