%% You should probably cite rfc9074 instead of this I-D.
@techreport{ietf-calext-valarm-extensions-00,
    number =    {draft-ietf-calext-valarm-extensions-00},
    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-valarm-extensions/00/},
    author =    {Cyrus Daboo and Kenneth Murchison},
    title =     {{VALARM Extensions for iCalendar}},
    pagetotal = 14,
    year =      2019,
    month =     jun,
    day =       10,
    abstract =  {This document defines a set of extensions to the iCalendar VALARM component to enhance use of alarms and improve interoperability between clients and servers.},
}