R. Humud, Hammad, et al. “Nonlinear Optical Properties of Polythiophene and Iodine Doped Thin Films by Aerosol Assisted Plasma Jet Polymerization at Atmospheric Pressure”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 36, no. 7, Dec. 2017, pp. 70-80, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7940.