Adding Interrefs can be a laborious issue, when the number of models is large and/or the models are complex/consist of many objects. 

In order to make the modeler's life easier, we implemented an Interref editor. With this solution, the modeler finds a complete list of referenceable objects by pressing one button only. This clearly arranged list reflects relations between objects; thereby objects are listed hierarchically. Additionally the modeler can use the search function in order to quickly find objects.

Link:
   InterRef Editor - Tree List