Randy Bush, Thomas Narten. Clarifying when Standards Track Documents may Refer Normatively to Documents at a Lower Level. RFC, 3967:1-6, December 2004. [doi]
@article{rfc3967,
title = {Clarifying when Standards Track Documents may Refer Normatively to Documents at a Lower Level},
author = {Randy Bush and Thomas Narten},
year = {2004},
month = {December},
doi = {10.17487/RFC3967},
url = {https://doi.org/10.17487/RFC3967},
researchr = {https://researchr.org/publication/rfc3967},
cites = {0},
citedby = {0},
journal = {RFC},
volume = {3967},
pages = {1-6},
}