[1]Thang, T.V. et al. 2014. Systhesis and characterization of poly (N-vinyl pyrrolidon – co-vinyl acetate). <i>Vietnam Journal of Science and Technology</i>. 52, 3 (Jul. 2014), 349–355. DOI:https://doi.org/10.15625/0866-708X/52/3/3314.