From Zelda Wiki.org

Purpose

This template is a shortcut to adding a references section at the end of an article. This template adds a scroll bar, like on the page Gerudo. A scroll bar is used for pages that have many references or that have several very long references.

Usage

To use this template, type:    {{Subst:Refbar}}

Then save the page.

What This Adds

After the page is saved, the template will add the following lines:
==References==
<div class="references-small" style="height:175px; overflow: auto; padding: 5px">
<references/>
</div>

To add a references section without a scroll bar, use the Ref template.