%% You should probably cite rfc9253 instead of this I-D.
@techreport{ietf-calext-ical-relations-11,
    number =    {draft-ietf-calext-ical-relations-11},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-calext-ical-relations/11/},
    author =    {Michael Douglass},
    title =     {{Support for iCalendar Relationships}},
    pagetotal = 19,
    year =      2022,
    month =     mar,
    day =       22,
    abstract =  {This specification updates the iCalendar RELATED-TO property defined in RFC 5545 by adding new relation types and introduces new iCalendar properties (LINK, CONCEPT, and REFID) to allow better linking and grouping of iCalendar components and related data.},
}