DJEBBARI Souhila http://staff.univ-batna2.dz/djebbari_souhilaB7s.djebbari@univ-batna2.dzp: 0332659841
IBECHENINENE Samira http://staff.univ-batna2.dz/ibecheninene-samiraB2s.ibecheninene@univ-batna2.dzp: 0331265874