[1] Univ Constantine 1 Freres Mentouri, Fac Sci Exactes, Lab Phys Math & Subat, Constantine, Algeria
[2] Univ Hradec Kralove, Fac Sci, Dept Phys, Rokitanskeho 62-26, Hradec Kralove 50003, Czech Republic
[3] Univ Oum El Bouaghi, Fac Sci Exactes & SNV, Dept Sci Matiere, Lab Syst Dynam & Controle ISDC, Oum El Bouaghi 04000, Algeria