?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Mitchell&rft.aufirst=J.&rft.au=Mitchell%2C+J.&rft.title=IEEE+Transactions+on+Education&rft.pages=587-594&rft.issn=0018-9359&rft.issue=4&rft.atitle=Problem-based+learning+in+communication+systems%3A+student+perceptions+and+achievement&rft.volume=53&rft.date=2009&rft.genre=article