Mohammed Aroudj, et al. “Density Functional Theory Analysis of Structural and Electronic Properties of IV–VI Semiconductors: PbSe, PbS, and PbSe₁₋ₓSₓ Alloys”. International Journal of Computational and Experimental Science and Engineering, vol. 11, no. 4, Oct. 2025, doi:10.22399/ijcesen.4164.