User Multiplexing in RTP payload between IP Telephony Gateways. IETF
Draft. - August, 1998.
ETNO Reflection Document on the European Commission Notice
concerning the status of voice on the Internet pursuant to Directive
90/388/EEC (RD56 06/97).
Kevin Werbach. Digital Tornado: The Internet and Telecommunications
Policy. The FCC Office of Plans and Policy's Working Paper Series. -
March, 1997.