Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Density on a manifold:

"

In detail, if (Uαα) is an atlas of coordinate charts on M, then there is associated a local trivialization of | Λ | M s {\displaystyle \left|\Lambda \right|_{M}^{s}}