Doloriel, N.S. (2026) “Optimizing Resource Use in Upland Rice Farming: A Cobb-Douglas ProductivityAnalysis in Caraga Region, Philippines”, Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), 16(3), p. 301. doi:10.29244/jpsl.16.3.301.