Ismillayli, N., S. R. Kamali, S. Hadi, and D. Hermanto. “Synthesis of Biodegradable Superabsorbent Polymers from Carboxymethyl Cellulose/Humic Acid”. Acta Chimica Asiana, vol. 2, no. 2, Aug. 2019, pp. 95-98, doi:10.29303/aca.v2i2.8.