Arsi, Sefti Dini, Muhammad Farid, and Refrizon Refrizon. “RETRACTED: Identification of the Presence of Pumice Stone Based on Georadar Data and Geoelectric Resistivity Data in Ampenan District and Sekarbela District, Mataram City”. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS 17, no. 1 (February 23, 2025): 41–52. Accessed March 4, 2026. https://jif.fmipa.unand.ac.id/index.php/jif/article/view/663.