Hoàng Văn, D., A. Phạm, T. Lê, T. Nguyễn, T. Phan, and V. Trần. “Investigating the Existence of Oxygen Interstitial in CuCr1􀀀xMgxO2 [0.00 X 0.30] Thermoelectric Materials by X-Ray Photoelectron Spectroscopy [XPS]”. Science & Technology Development Journal: Natural Sciences, Vol. 5, no. 2, Apr. 2021, pp. 1125-34, doi:https://doi.org/10.32508/stdjns.v5i2.973.