Tiwari, Vinod K.; Singh, Desh D.; Hussain, Hakkim A.; Mishra, Bhuwan B.; Singh, Archana
Monatshefte fur Chemie, 2008 , vol. 139, # 1 p. 43 - 48

Devi, Nepram Sushuma; Singh, Sarangthem Joychandra; Singh, Okram Mukherjee
Synlett, 2012 , vol. 23, # 14 p. 2111 - 2115