Nada, Fariz, and Ninuk Herlina. “Analysis of Drought Index and Its Relationship With Rose (Rosa sp.) Productivity in Batu City, East Java”. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, vol. 15, no. 2, Oct. 2026, pp. 154–159, doi:10.36706/jlso.15.2.2026.822.