Wasis, B., S. H. Ghaida, and B. Winata. “Application of Coconut Shell Charcoal and NPK Fertilizer Toward Acacia Mangium Growth on the Soil of Ex-Limestone Mining in Bogor, Indonesia”. Archives of Agriculture and Environmental Science, vol. 4, no. 1, Mar. 2019, pp. 75-82, doi:10.26832/24566632.2019.0401012.