LAABASSI Mohammed http://staff.univ-batna2.dz/laabassi-mohammedB3m.laabassi@univ-batna2.dzp: 0331214158
LAKHDARI Noureddine http://staff.univ-batna2.dz/lakhdari-noureddineB4n.lakhdari@univ-batna2.dzp: 0331214158
LEBBAL Mohamed El Hadi http://staff.univ-batna2.dz/lebbal-mohamed-el-hadiB6m.lebbal@univ-batna2.dzp: 0332659841