Isnan, S., N. H. Nordin, A. Rahman, A. Rosly, A. Aziz, Z. Mat Radzi, A. Zarim, and M. S. B. Mohd Abu. “Application of GIS: Maritime Accident Analysis in Malaysian Waters Using Kernel Density Function”. Transactions on Maritime Science, vol. 10, no. 2, Oct. 2021, pp. 348-54, doi:10.7225/toms.v10.n02.004.