%% You should probably cite rfc2368 instead of this I-D.
@techreport{hoffman-mailto-url-05,
    number =    {draft-hoffman-mailto-url-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hoffman-mailto-url/05/},
    author =    {Paul E. Hoffman and Larry M Masinter and Jamie Zawinski},
    title =     {{The mailto URL scheme}},
    pagetotal = 10,
    year =      1998,
    month =     jun,
    day =       9,
    abstract =  {This document defines the format of Uniform Resource Locators (URL) for designating electronic mail addresses. {[}STANDARDS-TRACK{]}},
}