Siangproh, W., A. . Anekrattanasap, and A. Meoipun. “Metal Detecting Sensors: A Review on the Transition from Traditional Sensors to Field-Portable Sensors”. Science Essence Journal, vol. 39, no. 1, June 2023, pp. 105-44, https://ejournals.swu.ac.th/index.php/sej/article/view/15246.