Khurshed Ahmad (Cluster University Srinagar-Jammu and Kashmir Shah India),Brijesh (Indian Institute of Technology Ropar Kumbhani Punjab India.),Raul F. (Department of Physics & Astronomy Garcia-Sanche
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Shah, Khurshed Ahmad (Department of Physics, S. P. College, Cluster University Campus, Cluster University, Srinagar, INDIA),Farooq Ahmad (University of Kashmir Khanday Hazratbal Srinagar India)
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