Helal, Mohamed, Biomathamatics Laboratory, University Djillali Liabes of Sidi Bel Abbes, Algeria, 22000, Algeria

• Nonlinear Studies Vol 27 No 3 (2020): Nonlinear Studies (NS) - Articles
  The role of the net reproduction rates on the persistence of leukemia
  Abstract
• Nonlinear Studies Vol 29 No 4 (2022): Nonlinear Studies (NS) - Articles
  A mathematical study of a crop-pest model with the Caputo fractional-order derivative
  Abstract