Sy, S., Harmiwati, .-., Kurniawati, D., Aziz, H., Chaidir, Z., & Zein, R. (2018). Removal of Zinc onto Several Adsorbents Derived from Waste Activated Sludge of Crumb Rubber Industry (CRI-WAS). International Journal on Advanced Science, Engineering and Information Technology, 8(1), 157–164. https://doi.org/10.18517/ijaseit.8.1.4084