Valdés, C., et al.. Use of Poly(vinyl Alcohol)-malic Acid (CLHPMA) Hydrogels and Chitosan Coated Calcium Alginate (CCCA) Microparticles as Potential Sorbent Phases for the Extraction and Quantitative Determination of Pesticides from Aqueous Solutions. no. 22, MDPI AG, Nov. 2021, doi:10.3390/polym13223993.