While the main reference documents for CMMC (Cybersecurity Maturity Model Certification) are published by the US OSD (Office of the Under Secretary of Defense) there are some more interesting documents you should reference when diving into CMMC….
This page is a providing a quick overview of useful stuff, when diving into CMMC.
(more information added when interesting links are found. Feel free to notify me if you think information is missing or out of date).
Sadly, not all information is not posted on the CMMC home/landing page, but for example this public briefing presentation in PDF format is very useful: