Author: Urs Format: MarkdownItextouched the formatting of the reference
<a href="https://ncatlab.org/nlab/revision/diff/Model+Categories+and+Their+Localizations/2">diff</a>, <a href="https://ncatlab.org/nlab/revision/Model+Categories+and+Their+Localizations/2">v2</a>, <a href="https://ncatlab.org/nlab/show/Model+Categories+and+Their+Localizations">current</a>