“SYNTHESIS, INVESTIGATION AND CONDUCTIVE PROPERTIES OF ALLUAUDITE-RELATED PHASES: DOI: Https: doi.Org 10.17721 1728-2209.2020.1(57).1”. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry, vol. 57, no. 1, Dec. 2020, pp. 6-9, https://chemistry.bulletin.knu.ua/article/view/8354.