A. K. Kushwaha - Department of Physics, K.N. Govt. P.G. College Gyanpur, Bhadohi, India
S. P. Mishra - Procter & Gamble
Shivali Chauhan - Department of Physics, M.S.J. Govt. College, Bharatpur, India
M. K. Vishwakarma - Department of Physics, K.N. Govt. P.G. College Gyanpur, Bhadohi, India
R. Ahmed - University of the Punjab
R. Khenata - Université Mustapha Stambouli de Mascara
Bakhtiar Ul Haq
S. Bin Omran - King Saud University