?url_ver=Z39.88-2004&rft_id=10.1109%2FICCET.2009.258&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=K.&rft.au=Nisar%2C+K.&rft.aulast=Nisar&rft.isbn=9780769535210&rft.date=2009&rft.title=Internet+call+delay+on+peer+to+peer+and+phone+to+phone+VoIP+network&rft.genre=proceeding