Farooqui, M., V. Kumar, and A. K. Gupta. “Analysis of Tunable Terahertz Generation in Gallium Phosphide Using Difference Frequency Mixing”. Journal of Graphic Era University, vol. 6, no. 1, Feb. 2023, pp. 94-101, https://www.journal.riverpublishers.com/index.php/JGEU/article/view/93.