M. A. Matin, A. Mahmud, M. N. Islam, A. A. Khatun, and M. N. Chowdhury, “Polymerization Kinetics, Biodegradation and pH-Responsive Behavior of Poly[(Citric Acid-co-PEG-400)-Ran-(Glycerol)]”, J. Compos. Biodegradable Polym., vol. 6, pp. 20–27, May 2018.