Mohammad Radzi Sudin, Dr, Jabatan Fizik, Fakulti Sains, Universiti Teknologi Malaysia (UTM), Skudai, Johor. (Dated: Aug 2005)

Asiah Hussain, Prof. Madya Dr., Jabatan Kimia, Fakulti Sains, Universiti Teknologi Malaysia, Skudai, Johor. (Dated: Aug 2005)