Items where Author is "El-Naggar, A"
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El-Naggar, A and Khalil, K and Omran, A (2017) Harmonic and Sub-Harmonic Periodic Solutions (1/2, 1/3) of Generalized Mathieu-Van der Pol-Duffing Equations. Journal of Scientific Research and Reports, 13 (6). pp. 1-15. ISSN 23200227