Fred Baker, Warren Harrop, Grenville Armitage. IPv4 and IPv6 Greynets. RFC, 6018:1-9, September 2010. [doi]
@article{rfc6018, title = {IPv4 and IPv6 Greynets}, author = {Fred Baker and Warren Harrop and Grenville Armitage}, year = {2010}, month = {September}, doi = {10.17487/RFC6018}, url = {https://doi.org/10.17487/RFC6018}, researchr = {https://researchr.org/publication/rfc6018}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {6018}, pages = {1-9}, }