Nguyen, D.-D., V.-L. Pham, Q.-T. Ta, and H.-C. Nguyen. “Study on the Fabrication of ZnO Nanomaterials by the Sol-Gen Method Combined With Multi-Layer Spin Coating and Annealing”. HPU2 Journal of Science: Natural Sciences and Technology, vol. 1, no. 1, Aug. 2022, pp. 46-52, doi:10.56764/hpu2.jos.2022.1.1.46-52.