Huang, Meina, et al. “Effects of Moisture on Reaction of Hexamethylene Diisocyanate and HO-Terminated Poly(lactide-Co-P-Dioxanone) in DMF System”. Asian Journal of Chemistry, vol. 27, no. 9, May 2015, pp. 3157-63, doi:10.14233/ajchem.2015.18314.