Sadeghi, Mohammad, Morteza Nasrolahi, and Mojgan Yarahmadi. 2011. “Synthesis of Pectin-poly(acrylonitrile) Superabsorbent Hydrogel With Salt and PH Responsiveness Properties”. Asian Journal of Chemistry 23 (12):5295-5300. https://asianpubs.org/index.php/ajchem/article/view/11137.