Remote Authentication Dial In User Service (RADIUS). - Carl Rigney; Allan C. Rubens; William Allen Simpson; Steve Willens (RFC, 1997)

Layer Two Tunneling Protocol "L2TP". - W. Mark Townsley; Andrew J. Valencia; Allan C. Rubens; Gurdeep Singh Pall; Glen Zorn; Bill Palter (RFC, 1999)

RADIUS Attributes for Tunnel Protocol Support. - Glen Zorn; Dory Leifer; Allan C. Rubens; John Shriver; Matt Holdrege; Ignacio Goyret (RFC, 2000)