VANGNAI, S.; ATTANANDANA, T.; TAWATEEKUL, A. Sulfide Formation and Rice Yield in Ongkarak Soil. Agriculture and Natural Resources, Bangkok, Thailand, v. 8, n. 1, p. 23–27, 1974. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240676. Acesso em: 18 sep. 2026.