1. Mannie, E.: Generalized multi-protocol label switching (GMPLS) architecture, RFC 3945, October 2004
2. Farrel, A., Vasseur, J.P., Ash, J.: A path computation element (PCE)-based architecture, RFC 4655, August 2006
3. Vasseur, J.P., Ayyangar, A., Zhang, R.: A per-domain path computation method for establishing inter-domain traffic engineering (TE) label switched paths (LSPs), RFC 5152, February 2008
4. Vasseur, J.P., Zhang, R., Bitar, N., Le Roux, J.L.: A backward-recursive PCE-based computation (BRPC) procedure to compute shortest constrained inter-domain traffic engineering label switched paths, RFC 5441, April 2009
5. King, D., Farrel, A.: The application of the PCE architecture to the determination of a sequence of domains in MPLS & GMPLS, IETF draft draft-king-pce-hierarchy-fwk-04.txt, July 2010