O.C. Ogbonnaya, D. Singh and J. Ohakwe
Asian Journal of Applied Sciences 4 ( 1 ): 53 - 62 , 2011
P. Ashok, A. Kyada, P. Subbarao, S. Suthar, D. Singh and K. Vadaliya
International Journal of Pharmacology 6 ( 3 ): 157 - 172 , 2010
Sumit Shrivastava, Nighat Fahmi, D. Singh and R. V. Singh
Journal of Coordination Chemistry 63 ( 10 ): 1807 - 1819 , 2010
P. Ashok, D. Singh, D.N. Poulose and B. Suresh
Pakistan Journal of Biological Sciences 17 ( 3 ): 346 - 355 , 2014