Setiawati, A. R., J. Lumbanraja, S. Nurul Aini, D. Dermiyati, H. Buchari, and Z. Naspendra. “Texture and Chemical Properties of Two Depth Soils in a Toposequence of Anak Krakatau Before December 2018 Eruption”. JOURNAL OF TROPICAL SOILS, vol. 25, no. 2, May 2020, pp. 71-81, doi:10.5400/jts.2020.v25i2.71-81.