1. Zhao Feng-qi, Chen Pei, Hu Rong-zu, Luo Yang, Zhang Zhi-zhong, Zhou Yan-shui, Yang Xu-wu, Gao Yin, Gao Sheng-li, and Shi Qi-zhen, J. Hazard. Mat., A113, 67 (2004).
2. C. H. Lim, T. K. Kim, K. H. Kim, and K.-H. Chung, Bull. Korean. Chem. Soc., 31(5), 1400 (2010).
3. N. N. Makhova, I. V. Ovchinnikov, B. N. Khasanov, and L. I. Khmelnitskii, Izv. Akad. Nauk SSSR, Ser. Khim., No. 3, 646 (1982).
4. Zhong Huan Lin, Doctor of Science Thesis, Inha University College School (2010).
5. F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, G. Orpen, and R. J. Taylor, Chem. Soc. Perkin Trans. II, No. 12, S1 (1987).