“GAS SENSITIVE SEMICONDUCTOR NANOMATERIALS FOR CREATION OF HYDROGEN SENSORS: DOI: Https: doi.Org 10.17721 1728-2209.2020.1(57).10”. Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, vol. 57, no. 1, Dec. 2020, pp. 40-44, https://chemistry.bulletin.knu.ua/en/article/view/8630.