Pires AMM, Mattiazzo ME, Berton RS. Organic acids as extractors of phytoavailable heavy metals in soils treated with sewage sludge. PAB [Internet]. 2004 Jul. 1 [cited 2025 Dec. 9];39(7):671-6. Available from: https://apct.sede.embrapa.br/pab/article/view/6824