البحث الرابع عشر
14- Mohamed M. Mousa, A. Kaltayev and S. F. Ragab, Investigation of a transition from steady convection to chaos in porous media using piecewise variational iteration method, World Academy of Science, Engineering and Technology (WASET), Vо1. 58 (2009), 1088–1097.
Paper link: https://waset.org/publications/6226
