Paul Vixie, Duane Wessels. Hyper Text Caching Protocol (HTCP/0.0). RFC, 2756:1-15, January 2000. [doi]
@article{rfc2756, title = {Hyper Text Caching Protocol (HTCP/0.0)}, author = {Paul Vixie and Duane Wessels}, year = {2000}, month = {January}, doi = {10.17487/RFC2756}, url = {https://doi.org/10.17487/RFC2756}, researchr = {https://researchr.org/publication/rfc2756}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {2756}, pages = {1-15}, }