Jose, R. L., Gigimol, M., & Mathew, B. (2019). Adsorptive Removal of Anionic Azo Dye Acid Black 194 from Aqueous Solution using NNMBA-Crosslinked Poly N-Vinyl Pyrrolidone Hydrogel. Asian Journal of Chemistry, 32(2), 311–316. https://doi.org/10.14233/ajchem.2020.22338