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 Coupling:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

Gear couplings are generally limited to angular misalignments, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4°–5°.[citation needed] Universal joints are capable of higher misalignments.