Siahaan, V. P. L., and F. Kartiasih. “Revealing Competitiveness and Key Drivers of Nickel (HS 75) Exports: Evidence from Seven Major Destinations, 2014–2023”. Proceedings of The International Conference on Data Science and Official Statistics, vol. 2025, no. 1, Dec. 2025, pp. 953-66, doi:10.34123/icdsos.v2025i1.640.