[STD35]    Internet Standard 35,
              <https://www.rfc-editor.org/info/std35>.
              At the time of writing, this STD comprises the following:

              Rose, M. and D. Cass, "ISO Transport Service on top of the
              TCP Version: 3", STD 35, RFC 1006, DOI 10.17487/RFC1006,
              May 1987, <https://www.rfc-editor.org/info/rfc1006>.