Li, Z., T. Deng, X. Zeng, F. Deng, and L. Shu. “Theoretical Modeling and Implementation of Traveling Wave Sensor Based on PCB Coils: New Perspectives”. New Insights into Physical Science Vol. 2, July 2020, pp. 59-76, https://stm1.bookpi.org/index.php/nips-v2/article/view/1766.