Gunawan C, Fung LK, Nul Hakim L, Wahyudi E, Pramana A, Zalfiatri Y. Paper Mill Sludge as a Substitute Material in Paving Blocks for a Sustainable Waste Management Approach. jestm [Internet]. 2025 Sep. 4 [cited 2026 May 6];5(2):212-20. Available from: https://jes-tm.org/index.php/jestm/article/view/269