Vigorous Raido, et al. “APLIKASI VERTICAL ELECTRICAL SOUNDING DALAM MENGIDENTIFIKASI LAPISAN ANDESIT PADA JALAN INSINYUR SUTAMI BANDAR LAMPUNG”. Journal of Innovation Research and Knowledge, vol. 5, no. 8, Jan. 2026, pp. 9851-64, https://mail.bajangjournal.com/index.php/JIRK/article/view/12197.