Primaningtyas, W. E., F. Rachman, T. P. Ramadhani, and A. Sa’diyah. “tudy of ariation of inder aterials n ermeability f oundry reen and”. nternational ournal of arine ngineering nnovation and esearch, vol. 8, no. 2, July 2025, pp. 360-6, doi:10.12962/j25481479.v8i2.5467.