M. Rendana, W. M. R. Idris, S. Abdul Rahim, Z. Ali Rahman, and T. Lihan, “Rubber bark dust-zeolite composite improved mechanic strength of soft paddy soil through improved microstructure”, Sains Tanah J. Soil Sci. Agroclimatology, vol. 18, no. 2, pp. 194–202, Dec. 2021, doi: 10.20961/stjssa.v18i2.56345.