“SUBSTITUTIONS BA2+ LN3+ IN GDLNXBA2-XCU3O7RZ (LN-LA, PR, ND, SM, EU, GD) 0D X D 0,6 SYSTEMS: UDC 546. 65’ 56’ 431”. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry, vol. 49, no. 1, Nov. 2013, pp. 5-7, https://chemistry.bulletin.knu.ua/article/view/8432.