Laadel, Noureddine, Farida Benia, Abdelmalek Oulmi, and Sofiane Guettaf. 2020. “Contribution to the Study of Xylophagus Insects and Their Role in the Decline of Alep Pine (Pinus Halepensis Mill.) in El Ouldja’s Megsem Forest (Setif - Algeria)”. Journal of Drug Delivery and Therapeutics 10 (5), 105-7. https://doi.org/10.22270/jddt.v10i5.4385.