This is one of the options contained in the Show references and info panel that is accessible for every page (Tiddler.)

This menu option opens a drop down pick-list of all/any related Tiddlers that link to (or 'reference') the one you are currently studying.

For example, clicking on the References option from menu for this Tiddler right here will show a list of all the other Tiddlers that have Links to this one.

Why?

This is more obviously useful in a clinical/learning framework. A worker might read a Tiddler about a particular subject, and use the References button to locate associated material from a wide variety of areas.

Sometimes, referenced associations discovered in this way will be unexpected, or will have been overlooked, so that fostering a habit of checking for Integrative links in this way is a helpful KeyWorker practice.