The best tool for finding link building opportunities with Wikipedia is WikiGrabber.
The tool has been updated in recent years and is really powerful.
You can:
Use dead links to build Wikipedia backlinks.
Use broken links to get links from authority sites.
Include your own unique links in Wikipedia pages.
If you can replicate this with four or five pages, the amount of links you’ll be able to build with targeted, relevant pages keeps growing.
This approach makes it really easy to get some serious link juice & relevant traffic!