Point-to-Point Protocol: A proposal for multi-protocol transmission of datagrams over Point-to-Point links. - Drew D. Perkins (RFC, 1989)

Point-to-Point Protocol for the transmission of multi-protocol datagrams over Point-to-Point links. - Drew D. Perkins (RFC, 1990)

Point-to-Point Protocol (PPP) initial configuration options. - Drew D. Perkins; Russ Hobby (RFC, 1990)

Requirements for an Internet Standard Point-to-Point Protocol. - Drew D. Perkins (RFC, 1993)