Saeidi, M., Sarpoolaky, H., Mirkazemi, S. M. (2012). 'Ultrasonic–Assisted Co–Precipitation Method of Preparation of Nanocomposites in The Al2O3–TiO2–ZrO2 System: Characterization and Microsturcture', Journal of Ultrafine Grained and Nanostructured Materials, 45(1), pp. 7-12. doi: 10.7508/jufgnsm.2012.01.002