1. H. Kim, B. Wesstrom, S. Alam, T. Ouchi, and C. Azimi, Rare Metals Technology (Springer, TMS, 2018), p 340
2. K. Bae, T. Kim, S. Lee, S. Namkung, and T. Jang, J. Appl. Phys. 112(093912), 1–5. (2012).
3. A.K. Pathak, M. Khan, K.A. Gschneidner, W. Ralph, and R.W. McCallum, Adv. Mater. 27, 2663–2667. (2015).
4. N. Menad, and A. Seron, Int. J. Waste Resour. 7(1), 1–7. (2017).
5. M. Yin, M. Liu, W. Lai, and C. Dong, Chin. J. Rare Met. 38(6), 1093–1098. (2014).