1. S. M. Lakiza, Ya. S. Tishchenko, V. P. Red’ko, and L. M. Lopato, “The Al2O3–HfO2–La2O3 phase diagram. I. Liquidus and solidus surfaces,” Powder Metall. Met. Ceram., 49, No. 9–10, 516–527 (2011).
2. S. M. Lakiza, Ya. S. Tishchenko, V. P. Red’ko, and L. M. Lopato, “The Al2O3–HfO2–La2O3 phase diagram. II. Phase equilibria at 1250 and 1600°C,” Powder Metall. Met. Ceram., 50, No. 5–6, 345–349 (2011).
3. L. M. Lopato, A. V. Shevchenko, and G. I. Gerasimyuk, “The HfO2–Al2O3 system,” Inorg. Mater., 12, No. 6, 1623–1626 (1978).
4. A. V. Shevchenko, L. M. Lopato, and Z. A. Zaitseva, “Interaction of HfO2 with lanthanum, praseodymium, and neodymium oxides at high temperatures,” Inorg. Mater., 20, No. 9, 1530–1534 (1984).
5. I. A. Bondar and N. V. Vinogradova, “Phase equilibria in the lanthanum oxide–aluminum oxide system,” Izv. Akad. Nauk SSSR. Ser. Khimiya, No. 5, 785–790 (1964).