Suswati, D., B. H. Sunarminto, D. Shiddieq, and D. Indradewa. “Use of Ameliorants to Increase Growth and Yield of Maize (Zea Mays L.) in Peat Soils of West Kalimantan”. JOURNAL OF TROPICAL SOILS, vol. 19, no. 1, Apr. 2015, pp. 35-41, doi:10.5400/jts.2014.v19i1.35-41.