David L. Mills. Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI. RFC, 2030:1-18, October 1996. [doi]
@article{rfc2030, title = {Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI}, author = {David L. Mills}, year = {1996}, month = {October}, doi = {10.17487/RFC2030}, url = {https://doi.org/10.17487/RFC2030}, researchr = {https://researchr.org/publication/rfc2030}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {2030}, pages = {1-18}, }