?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FAMM.39.176&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ibrahim&rft.au=Ibrahim%2C+M.N.&rft.aufirst=M.N.&rft.volume=39&rft.date=2011&rft.pages=176-181&rft.title=Applied+Mechanics+and+Materials&rft.isbn=9780878492183&rft.issn=16609336&rft.atitle=Mobile+learning%3A+An+application+prototype+for+AVL+tree+learning+object&rft.genre=article