N. Ismillayli, S. R. Kamali, S. Hadi, and D. Hermanto, “Synthesis of Biodegradable Superabsorbent Polymers from Carboxymethyl Cellulose/Humic Acid”, Acta.Chim.Asiana, vol. 2, no. 2, pp. 95–98, Aug. 2019.