I. A.-D. . H. A. Al-Saidi, H. F. Hussein, and N. S. Hashim, “NONLINEAR OPTICAL PROPERTIES AND OPTICAL POWER LIMITING OF POLY (3HT- Co - Th) - PMMA POLYMER BLEND FILMS”, Int. J. Eng. Sci. Tech, vol. 5, no. 1, pp. 1–10, Jan. 2021.