1. M. Saxena, A.K. Kukreti, S. Gupta, M.K. Aggarwal, MIT Int. J. Electr. Commun. Eng. 3(1), 29 (2013)
2. N. Mehta, J. Sci. Ind. Res. 65(10), 777 (2006)
3. A.K. Singh, Opto Electron. Rev. 20(3), 226 (2012)
4. K. Tanaka, K. Shimakawa, Phys. Rev. B. 39, 1270 (1989)
5. R.A. Zingaro, W.C. Cooper, Selenium (Van Nostrand Reinhold Company, New York, 1974)