Ghahri, Saman, and Byung-Dae Park. “Ether Bond Formation in Waste Biomass–Derived, Value-Added Technical Hardwood Kraft Lignin Using Glycolic Acid”. Journal of Research Updates in Polymer Science 12 (November 20, 2023): 171–179. Accessed April 19, 2025. http://lifescienceglobalca.com/index.php/jrups/article/view/9342.