A. Jantaupalee, R. Wongsan, P. Khamsalee, A. Wannakomol, and K. Tansuwan, “A STUDY OF RADIO WAVE PROPAGATION IN THE CAVE FOR DEVELOPING THE THROUGH-THE-EARTH APPLICATION”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 26, no. 118, pp. 74–86, Jun. 2024.