“STUDY OF SUBSTITUTING IN Bi - CONTAINING HIGH-TEMPERATURE SUPERCONDUCTING CERAMICS: UDC 546. 87’42’56”. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry 48, no. 1 (September 6, 2010): 4–5. Accessed February 14, 2026. https://chemistry.bulletin.knu.ua/article/view/8299.