%% You should probably cite draft-ietf-pim-igmp-mld-extension instead of this I-D.
@techreport{venaas-pim-igmp-mld-extension-01,
    number =    {draft-venaas-pim-igmp-mld-extension-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-venaas-pim-igmp-mld-extension/01/},
    author =    {Mahesh Sivakumar and Stig Venaas and Zheng Zhang},
    title =     {{IGMPv3/MLDv2 Message Extension}},
    pagetotal = 8,
    year =      2020,
    month =     mar,
    day =       6,
    abstract =  {IGMP and MLD protocols are extensible, but no extensions have been defined so far. This document provides a well-defined way of extending IGMP and MLD, including a new extension type to distinguish between different extensions.},
}