%% You should probably cite draft-ietf-ipsecme-ikev2-intermediate instead of this I-D.
@techreport{smyslov-ipsecme-ikev2-aux-02,
    number =    {draft-smyslov-ipsecme-ikev2-aux-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-smyslov-ipsecme-ikev2-aux/02/},
    author =    {Valery Smyslov},
    title =     {{Intermediate Exchange in the IKEv2 Protocol}},
    pagetotal = 10,
    year =      2018,
    month =     dec,
    day =       3,
    abstract =  {This documents defines a new exchange, called Intermediate Exchange, for the Internet Key Exchange protocol Version 2 (IKEv2). This exchange can be used for transferring large amount of data in the process of IKEv2 Security Association (SA) establishment. Introducing Intermediate Exchange allows re-using existing IKE Fragmentation mechanism, that helps to avoid IP fragmentation of large IKE messages, but cannot be used in the initial IKEv2 exchange.},
}