N. A. Atta, S. . Muhammad Kabeer, and M. . David Femi, “PREPARATION AND OPTICAL ANALYSIS OF COPPER SULPHIDE THIN FILM USING CHEMICAL BATH DEPOSITION METHOD”, FJS, vol. 6, no. 3, pp. 307 – 312, Sep. 2022, doi: 10.33003/fjs-2022-0603-1079.