R. K. . Verma, A. . Jangid, and R. . Kumar, “Tunable Gas Sensing Properties of ZnO Thin Films through Layer Engineering: Structural, Morphological, and Optical Analysis”, IJISEM, vol. 4, no. 2, pp. 230–237, May 2025, doi: 10.69968/ijisem.2025v4i2230-237.