Hermawan, B., Novela, D. E., Putri, E. L., and Utami, W. A. “Comparison of permeable and water holding capacity between flat and steep soils”. International Journal of Agricultural Technology, vol. 21, no. 5, Sept. 2025, pp. 1805-16, doi:10.63369/ijat.2025.21.5.1805-1816.