SUTTHITHAMMOH, K. Electrochemical Properties of Humid Tropical Soils. Agriculture and Natural Resources, Bangkok, Thailand, v. 16, n. 1, p. 18–30, 1981. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240861. Acesso em: 18 sep. 2026.