Enyedi, G., Csaszar, A., Atlas, A., Bowers, C., and A. Gopalan, "An Algorithm for Computing IP/LDP Fast Reroute Using Maximally Redundant Trees (MRT-FRR)", RFC 7811, DOI 10.17487/RFC7811, June 2016, <https://www.rfc-editor.org/info/rfc7811>.