Bioavailability of heavy metals as a consequence of the variation in the contraction of humic and fulvic acids in the sediment of the Collotacocha high Andean wetland. Scién. Inge. [Internet]. 2022 Sep. 30 [cited 2026 Jul. 18];18(3):79-85. Available from: https://revistas.unitru.edu.pe/index.php/PGM/article/view/4812