Lin, J., Zhang, B., Yang, Y., Xiao, P., & Zhao, Y. (2016). Theoretical studies of the local structure and the epr parameters for tetragonal Cu$^{2+}$ center in mixed alkali cadmium phosphate glasses. Revista Mexicana De Física, 62(4), 325–329. https://doi.org/10.31349/RevMexFis.62.4.325