H. B. Pulunggono, M. Zulfajrin, and F. Irsan, “Distribution of nickel (Ni) in peatland situated alongside mineral soil derived from ultrabasic rocks”, Sains Tanah J. Soil Sci. Agroclimatology, vol. 18, no. 1, pp. 15–26, Jun. 2021, doi: 10.20961/stjssa.v18i1.45417.