%% You should probably cite draft-ietf-ipsecme-ikev2-auth-announce instead of this I-D.
@techreport{smyslov-ipsecme-ikev2-auth-announce-00,
    number =    {draft-smyslov-ipsecme-ikev2-auth-announce-00},
    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-auth-announce/00/},
    author =    {Valery Smyslov},
    title =     {{Announcing Supported Authenticating Methods in IKEv2}},
    pagetotal = 9,
    year =      2020,
    month =     mar,
    day =       6,
    abstract =  {This specification defines a mechanism that allows the Internet Key Exchange version 2 (IKEv2) implementations to indicate the list of supported authenticated methods to their peers while establishing IKEv2 Security Association (SA). This mechanism improves interoperability when IKEv2 partners are configured with multiple different credentials to authenticate each other.},
}