“INFLUENCE BISMUTH, SUBSTITUTIONS ON THE PROPERTIES OF COMPOUND BI2SR2CACU2OY: UDC 546.87’42’41’56”. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry, vol. 47, no. 2, July 2009, pp. 35-37, https://chemistry.bulletin.knu.ua/article/view/8416.