[1] Massari Stefania, Ruberti Marcello. Resources Policy, 2013, 38(1): 36.
[2] Zhu Jian, Huang Haiyou, Xie Jianxin. Journal of Iron and Steel Research, 2017, 29(7): 513.
[3] Song Shenhua, Xu Yewei, Chen Xianmiao, et al. Journal of Rare Earths, 2016, 34(10): 1062.
[4] Zhang J B, Tong L B, Xu C, et al. Materials Science & Engineering A, 2017, 708: 11.
[5] Du Yuzhou, Zheng Mingyi, Qiao Xiaoguang, et al. Materials Science & Engineering A, 2016, 673: 47.
[6] Wei Chunyan, Ding Meiying. Chinese Rare Earths, 2004, 25(5): 24.
[7] Farinas J C, Rucandio I, Pomares-Alfonso M S, et al. Talanta, 2016, 154: 53.
[8] Tian Lunfu, Zou Deshuang, Dai Yichun, et al. Spectrochimica Acta Part B, 2015, 110: 136.
[9] Kunimura Shinsuke, Kawai Jun. X-Ray Spectrometry, 2013, 42(3): 171.
[10] Wrobel P M, Bala S, Czyzycki M, et al. Talanta, 2017, 162: 654.
[11] Krishna A Keshav, Khanna Tarun C., Mohan K Rama. Spectrochimica Acta Part B, 2016, 122: 156.
[12] Cherkashina T Y, Shtel’Makh S I, Pashkova G V. Applied Radiation and Isotopes, 2017, 130: 153.
[13] Fan Shouzhong, Zhang Qin, Li Guohui, et al. Metallurgical Analysis, 2006, 26(6): 27.
[14] YUAN Jing, SHEN Jia-lin, LIU Jian-kun, et al. Spectroscopy and Spectral Analysis, 2018, 38(2): 582.
[15] Zinin D S, Bushuev N N, Kuznetsov V V. Journal of Analytical Chemistry, 2017, 72(3): 279.
