%% You should probably cite rfc9437 instead of this I-D.
@techreport{ietf-lisp-pubsub-04,
    number =    {draft-ietf-lisp-pubsub-04},
    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-lisp-pubsub/04/},
    author =    {Alberto Rodriguez-Natal and Vina Ermagan and Johnson Leong and Fabio Maino and Albert Cabellos-Aparicio and Sharon Barkai and Dino Farinacci and Mohamed Boucadair and Christian Jacquenet and Stefano Secci},
    title =     {{Publish/Subscribe Functionality for LISP}},
    pagetotal = 12,
    year =      2019,
    month =     sep,
    day =       12,
    abstract =  {This document specifies an extension to the use of Map-Request to enable Publish/Subscribe (PubSub) operation for LISP.},
}