Hien, Nguyen Thi Thanh, et al. “Characterization of Electrosprayed Chitosan PLA-PEG-PLA (copolymer) Nanoparticles for Encapsulation of Hydrophilic Drug”. Vietnam Journal of Science and Technology, vol. 60, no. 3, June 2022, pp. 436-4, doi:10.15625/2525-2518/16239.