%% You should probably cite draft-bernardos-nmrg-multidomain instead of this I-D.
@techreport{bernardos-nfvrg-multidomain-04,
    number =    {draft-bernardos-nfvrg-multidomain-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-bernardos-nfvrg-multidomain/04/},
    author =    {Carlos J. Bernardos and Luis M. Contreras and Ishan Vaishnavi and Robert Szabo and Xi Li and Francesco Paolucci and Andrea Sgambelluri and Barbara Martini and Luca Valcarenghi and Giada Landi and Dmitriy Andrushko and Alain Mourad},
    title =     {{Multi-domain Network Virtualization}},
    pagetotal = 36,
    year =      2018,
    month =     mar,
    day =       5,
    abstract =  {This document analyzes the problem of multi-provider multi-domain orchestration, by first scoping the problem, then looking into potential architectural approaches, and finally describing the solutions being developed by the European 5GEx and 5G-TRANSFORMER projects.},
}