Jiglu's knowledge wiki lets you quickly link to other knowledge entries by simply writing the name of the entry surrounded by double square brackets. However, the entry for a link may not be written yet or may have been wrongly written so it doesn't go anywhere.
You can see these unreferenced links by going to the knowledge entry index and selecting the View knowledge entries that have not yet been written option from the sidebar. From there you can view the entry the link was in or write the as-yet-unwritten entry.
1.0.0
How to find unreferenced wiki links.