1. H. Akhtar:
Applied Chemistry Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore, Pakistan
2. S. Hamid:
Applied Chemistry Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore, Pakistan
3. J. I. Khan:
Applied Chemistry Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore, Pakistan