@article{CAIA-IR-100900A, title = {{IPv4 and IPv6 Greynets}}, author = {F. Baker and W. Harrop and G. Armitage}, month = {00 September}, year = {2010}, volume = {RFC}, number = {6018}, journal = {Internet Engineering Task Force}, url = {http://www.rfc-editor.org/rfc/rfc6018.txt} }