D. Defrianto, S. Saktioto, A. S. Rini, S. Syamsudhuha, S. Anita, and Y. Soerbakti, “Exploration of Analyte Electrolyticity Using Multi-SRR-Hexagonal DNG Metamaterials and ZnO Thin Films”, IJEEI, vol. 13, no. 2, pp. 500–508, Jun. 2025, doi: 10.52549/ijeei.v13i2.6085.