Yusop, M. S. M. ., M. N. Razali, N. M. Tarmizi, M. N. A. G. Yolhamid, M. Azzeri, and A. H. A. Rahman. “Acoustic Approach to Determining Seabed Substrates Distribution at Mandi Darah Island, Sabah”. Transactions on Maritime Science, vol. 10, no. 2, Oct. 2021, pp. 374-82, doi:10.7225/toms.v10.n02.007.