Lin, J., and B. Zhang. “Theoretical Studies on the Electron Paramagnetic Resonance Parameters for the Tetragonal VO2+ Center in CaO-Al2O3-SiO2 System”. Revista Mexicana De Física, vol. 64, no. 1 Jan-Feb, Jan. 2018, pp. 13-17, doi:10.31349/RevMexFis.64.13.