%% You should probably cite draft-ietf-sieve-regex instead of this I-D. @techreport{murchison-sieve-regex-08, number = {draft-murchison-sieve-regex-08}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-murchison-sieve-regex/08/}, author = {Kenneth Murchison}, title = {{Sieve Email Filtering -- Regular Expression Extension}}, pagetotal = 8, year = 2004, month = oct, day = 27, abstract = {In some cases, it is desirable to have a string matching mechanism which is more powerful than a simple exact match, a substring match or a glob-style wildcard match. The regular expression matching mechanism defined in this draft should allow users to isolate just about any string or address in a message header or envelope.}, }