N. M. Hung, P. D. Hoat, P. T. Hung and N. V. Hoang, CuO nanoparticles prepared by alcohol-assisted hydrothermal synthesis for gas-sensing application: effect of pH value, Comm. Phys. 33 (2023) 435. DOI: https://doi.org/10.15625/0868-3166/18283.