Wu, Chenglin, et al. “Synthesis of Stimuli Responsive Graft Triblock Polymers via Combination of Reversible Addition-Fragmentation Chain Transfer Polymerization and Ring Opening Polymerization”. Asian Journal of Chemistry, vol. 25, no. 6, Jan. 2013, pp. 3344-8, doi:10.14233/ajchem.2013.13699.