UPHOFF, Norman. Farmer Innovations Improving the System of Rice Intensification (SRI). Jurnal Ilmu Tanah dan Lingkungan, [S. l.], v. 9, n. 2, p. 45–56, 2007. DOI: 10.29244/jitl.9.2.45-56. Disponível em: https://journal.ipb.ac.id/jtanah/article/view/2393. Acesso em: 25 dec. 2025.