1. The Department of Applied Chemistry, M.S. University, Baroda - 390 002, India
2. The Department of Chemistry, S.P. University, Vallabh Vidynagar - 388 120, India
3. The Department of Colour Chemistry and Dyeing, Leeds University, Leeds, UK
4. Central Laboratory, Gujarat State Fertilizer Company Ltd, Fertilizernagar, Vadodara - 391 750, India