Ifijen, I. H. ., and E. U. . Ikhuoria. “Generation of Highly Ordered 3D Vivid Monochromatic Coloured Photonic Crystal Films Using Evaporative Induced Technique”. Tanzania Journal of Science, vol. 45, no. 3, Mar. 2021, p. 439=449, https://tjs.udsm.ac.tz/index.php/tjs/article/view/213.