Agarwal, Smriti. “A Non Contact Multiple Ring CSRR Based Planar Microwave Sensor for Accurate Quality Estimation of Water Samples With Varying TDS”. Defence Science Journal 71, no. 03 (May 17, 2021): 378–382. Accessed August 10, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/16718.