A. Setiawan, U. Widyaningsih, A. Pamungkas, A. R. Bin Abdul Hadi, and D. A. Dewi, “Multivariate Risk Analysis of Echotoxic Chemicals of Ballast Water Chemicals Based on PCA and DSS Using ECOTOX GISIS Data”, Journal of Maritime Technology and Society, vol. 4, no. 3, pp. 139–152, Oct. 2025.