The contents of all pages are searched to find links to the current page. The BackLinks function also answers the question: "Which pages contain the title of this page?".

No other page links to id=162513 yet.

lib/config.php:156: Notice: Undefined variable: accept

lib/CachedMarkup.php (In template 'browse' < 'body' < 'html'):499: Notice: Only variables should be assigned by reference