1. C.W. Fan, D. Lin, Z.Z. Lu, J.Y. Wang, H.W. Zhang, M.H. Zhang, CN Patent 101,824,024, September 8, 2010.
2. V.L. Lucile, J.P. Lecouve, L. Pascal, WO Patent 2,004,029,036, April 8, 2004.
3. J.G. Liu, J.W. Guo, P. Wang, CN Patent 102,367,247, March 7, 2012.
4. A. Wolfgang, A. Gertrud, J. Christian, G.R. Matioram, WO Patent 2,010,034,806, April 1, 2010.
5. W.T. Shen, Q.J. Zhu, S. Xu, M.Z. Xia, J. Yin, CN Patent 103,450,150, December 18, 2013.