1. Julius Edgar, L.: Method and Apparatus for Controlling Electric Current.U.S. Patent No.1,745,175, 28 January 1930.
2. Mamak, M., Coombs, N., Ozin, G.A.: Mater13 3564. (2001)Chem
3. Zhang, R., Zhang, X., Hu, S.: Sens. Actuators B. 149, 143 (2010)
4. Wang, X., Zhai, B., Yang, M., Han, W., Shao: X 2013Mater. Lett.112 90
5. Zhang, X., Su, H., Yang, X.: J. Mol. Catal. A: Chem. 360, 16 (2012)