D. K. Tiwari, P. Pandey, S. P. Giri and J. L. Dwivedi
International Journal of Botany 7 ( 2 ): 126 - 144 , 2011
R.K. Sahu, A. Singh, R. Gupta, A. Roy and J. Dwivedi
International Journal of Pharmacology 8 ( 4 ): 271 - 276 , 2012