Determining acoustic round trip delay for VoIP conferences. - Trevor N. Yensen; Marios Parperis; Ioannis Lambadaris; Rafik A. Goubran (MMSP, 1998)

Echo target determination using acoustic round trip delay for voice over IP conferences. - Trevor N. Yensen; Marios Parperis; Rafik A. Goubran; Ioannis Lambadaris (ISCAS (4), 1999)

Voice over the internet: A tutorial discussing problems and solutions associated with alternative transport. - George Scheets; Marios Parperis; Ritu Singh (IEEE Commun. Surv. Tutorials, 2004)