Sparta, Andre, Jajang Sauman Hamdani, Yuyun Yuwariah, and Eliana Wulandari. “The Role of Tithonia Diversifolia in Sustaining Crop Productivity in Acid Soils”. Bulgarian Journal of Agricultural Science 31, no. 1 (February 25, 2025): 50–60. Accessed October 23, 2026. https://agriacad.eu/ojs/index.php/bjas/article/view/1186.