Layer Two Tunneling Protocol (L2TP) over Frame Relay. - Vipin Rawat; René Tio; Suhail Nanji; Rohit Verma (RFC, 2001)

Layer Two Tunnelling Protocol (L2TP) Over ATM Adaptation Layer 5 (AAL5). - Ajoy Singh; Rollins Turner; René Tio; Suhail Nanji (RFC, 2002)