S. Herlambang, M. Gomareuzzaman, D. Yudhiantoro, D. A. Riansyah, and R. D. Pitaloka, “Coconut Shell Biochar and Sheep Manure for Food Security of Maize on Samas Coastal Sandy Land”, cset, vol. 4, no. 1, pp. 102–110, Oct. 2025.