?url_ver=Z39.88-2004&rft_id=10.19026%2Frjaset.6.3493&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Lawal&rft.au=Lawal%2C+I.A.&rft.aufirst=I.A.&rft.title=Research+Journal+of+Applied+Sciences%2C+Engineering+and+Technology&rft.date=2013&rft.volume=6&rft.issn=20407459&rft.issue=21&rft.atitle=Simulation+model+to+improve+QoS+performance+over+fixed+WiMAX+using+OPNET&rft.pages=3933-3945&rft.genre=article