Touati, Zine-Eddine, <em>Laboratory of Semiconducting and Metallic Materials, University of Mohamed Khider Biskra, Algeria</em>
Toufik, DILMI /, University of Mohamed Boudiaf-M'SILA-Algeria
Toufik, Sahraoui, Non Metallic Materials Laboratory, Institute of Optics and Precision Mechanics, University of Ferhat Abbas Sétif 1, 19000 Sétif, Algeria.
tougherghi, fatah, Laboratory of Material Science and Engineering, USTHB, Babezzouar16111, Algeria.
Touia, amina, University BELHADJ Bouchaib, BP 284, Ain-Temouchent, 46000, Algeria.

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