“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”. 2022. SCIÉNDO INGENIUM 18 (3): 79-85. https://revistas.unitru.edu.pe/index.php/PGM/article/view/4812.