Hello. I did try search function to see if it's already been asked, as well as the document itself, Google etc.

I'm reading the new 800-171 r3 and under each requirement, they list supporting publications.

For example 03.01.01 account management has sp 800-46[14], sp 800-57-1[15] and so on.

What does the [ ] reference?

I tried looking at the supporting documents but I have no idea what it's referencing. If someone could let me know what it means?