“Investigations of Color Center Phenomena in Topaz and Quartz through Electron Spin Resonance With Reference to Optical Absorption and Nuclear Magnetic Resonance: Implications for Extended Mineral Applications”. Malaysian Journal of Fundamental and Applied Sciences, vol. 14, no. 1-2, Apr. 2018, pp. 142-9, https://doi.org/10.11113/mjfas.v14n1-2.958.