1. N. Thompson, P. Murugaraj, C. Rix, D.E. Mainwaring, J. Alloys Compd. 537, 147 (2012)
2. V. Liepina, K. Smits, D. Millers, L. Grigorjeva, C. Monty, Mater. Sci. Eng. 38, 012045 (2012)
3. Y.L. Chang, H.I. Hsiang, M.T. Liang, Ceram. Int. 35, 1027 (2009)
4. W. Chung, H.J. Yu, S.H. Park, B.H. Chun, J. Kim, S.H. Kim, J. Cryst. Growth 326, 75 (2011)
5. K.R.S. Preethi, C.H. Lu, J. Thirumalai, R. Jagannathan, T.S. Natarajan, N.U. Nayak, I. Radhakrishna, J. Phys. D Appl. Phys. 37, 2666 (2004)