Kumar, Ajay; Malhotra, Sanjay; Vats, Archana; Himanshu; Singh, Sanjay K.; Sharma, Sunil K.; Prasad, Ashok K.; Errington, William; Olsen, Carl E.; Jain, Subhash C.; Parmar, Virinder S. Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2002 , vol. 41, # 2 p. 360 - 367