In searching for information, I found many old websites and broken links. I decided to gather as much material as possible to share with people needing information on this topic. All posts list author, source and link. If you find some of your material here, you would rather not share, please drop me a line, I will remove it promptly. Thank you.
- Dead link checker (sciencetext.com)
- Are You Losing Visitors with Broken Links? How to Fix Them (BuildMySiteforFree.com)
- DSNotify (dsnotify.org)