Malis, A., Martini, L., Brayley, J., and T. Walsh, "Pseudowire Emulation Edge-to-Edge (PWE3) Asynchronous Transfer Mode (ATM) Transparent Cell Transport Service", RFC 4816, DOI 10.17487/RFC4816, February 2007, <https://www.rfc-editor.org/info/rfc4816>.