Cannot find "List of external references"

Hello,

I am trying to find out which parts/assemblies are referenced to which assemblies. I have found the option described here "In the FeatureManager design tree, right-click the feature, component, body, or part and select List External Refs." But when I try this, I cannot find this option (even though there is a reference to another assembly).

Another option would be to open every assembly and to see which parts/assemblies are used and to write this down, but this looks to me like an inefficient way to do this.

Can someone help me out with this. Thanks.