%% You should probably cite rfc7265 instead of this I-D.
@techreport{ietf-jcardcal-jcal-08,
    number =    {draft-ietf-jcardcal-jcal-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-ietf-jcardcal-jcal/08/},
    author =    {Philipp Kewisch and Cyrus Daboo and Mike Douglass},
    title =     {{jCal: The JSON format for iCalendar}},
    pagetotal = 33,
    year =      2013,
    month =     dec,
    day =       9,
    abstract =  {This specification defines "jCal", a JSON format for iCalendar data. The iCalendar data format is a text format for capturing and exchanging information normally stored within a calendaring and scheduling application, for example tasks and events. JSON is a lightweight, text-based, language-independent data interchange format commonly used in internet applications.},
}