%% You should probably cite rfc9333 instead of this I-D.
@techreport{ietf-lwig-minimal-esp-04,
    number =    {draft-ietf-lwig-minimal-esp-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-lwig-minimal-esp/04/},
    author =    {Daniel Migault and Tobias Guggemos},
    title =     {{Minimal ESP}},
    pagetotal = 14,
    year =      2021,
    month =     apr,
    day =       2,
    abstract =  {This document describes a minimal implementation of the IP Encapsulation Security Payload (ESP) defined in RFC 4303. Its purpose is to enable implementation of ESP with a minimal set of options to remain compatible with ESP as described in RFC 4303. A minimal version of ESP is not intended to become a replacement of the RFC 4303 ESP. Instead, a minimal implementation is expected to be optimized for constrained environment while remaining interoperable with implementations of RFC 4303 ESP. Some constrains include limiting the number of flash writes, handling frequent wakeup / sleep states, limiting wakeup time, or reducing the use of random generation. This document does not update or modify RFC 4303, but provides a compact description of how to implement the minimal version of the protocol. RFC 4303 remains the authoritative description.},
}