%% You should probably cite draft-ietf-jmap-calendars instead of this I-D.
@techreport{jenkins-jmapcalendars-01,
    number =    {draft-jenkins-jmapcalendars-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-jenkins-jmapcalendars/01/},
    author =    {Neil Jenkins},
    title =     {{JMAP for Calendars}},
    pagetotal = 9,
    year =      2019,
    month =     mar,
    day =       26,
    abstract =  {This document specifies a data model for synchronising calendar data with a server using JMAP.},
}