Ismail, W. ., W. K. Wan Abdul Khodir, S. . Abd Hamid, and R. . Daik. “Synthesis of Four-Arms Star-Shaped PCL-B-PEG As a Potential Amphiphilic Hydrogel”. Scientific Research Journal, vol. 18, no. 1, Feb. 2021, pp. 101-17, doi:10.24191/srj.v18i1.11515.