[BCP111]   Best Current Practice 111,
              <https://www.rfc-editor.org/info/bcp111>.
              At the time of writing, this BCP comprises the following:

              Heard, C., Ed., "Guidelines for Authors and Reviewers of
              MIB Documents", BCP 111, RFC 4181, DOI 10.17487/RFC4181,
              September 2005, <https://www.rfc-editor.org/info/rfc4181>.

              Heard, C., Ed., "RFC 4181 Update to Recognize the IETF
              Trust", BCP 111, RFC 4841, DOI 10.17487/RFC4841, March
              2007, <https://www.rfc-editor.org/info/rfc4841>.