@misc{
    ip6_tunnel,
    author = "Nuorvala, Ville",
    keywords = "IPv6 Tunneling, RFC 2473, Linux, IPv6",
    url = "http://www.kernel.org/pub/linux/kernel/v2.6/",
    year = "2003",
    flags = "public SOFTWARE",
    title = "{IP}v6-in-{IP}v6 tunnel"
}