Suswanto, Totok, et al. “Alleviating an Acid Sulfate Soil Cultivated to Rice (Oryza Sativa) Using Ground Magnesium Limestone and Organic Fertilizer”. Jurnal Ilmu Tanah Dan Lingkungan, vol. 9, no. 1, Apr. 2007, pp. 1-9, https://doi.org/10.29244/jitl.9.1.1-9.