Dere, A. “Refractive Index Dispersion and Determination of the Optical Constants of BaTiO3 Thin Film Prepared by Sol Gel”. JOURNAL OF MATERIALS AND ELECTRONIC DEVICES, vol. 6, no. 1, Jan. 2021, pp. 1-5, http://dergi-fytronix.com/index.php/jmed/article/view/131.