Dung, T., Khanh, V., Phuc, H.N.H., Thao, P.N.T., Anh, L.T.K., Dung, T.L., Hau, T.V., Tien, H.V., Lam, T.H. and Giang, H. 2021. Gelation time characterization method for polyvinyl alcohol-based hydrogel. Science and Technology Development Journal. 24, 3 (Aug. 2021), 2049-2057. DOI:https://doi.org/https://doi.org/10.32508/stdj.v24i3.2530.