Automatically include links to “related by category” pages.

A page can be categorized by one or more categories but I think could be useful to include links to “other pages” with the same category. 

Example: pages A, B, C with category Z were defined. I’m reading page A, at the bottom “category Z link” appears. But I want to directly include a link to B and C. Something like the contents that appears when category page is being read.

At the bottom should appear something like: 

Categories: linktoZ

LinktoA  LinktoB