Author: Urs Format: MarkdownItexbrushed-up the list of references
<a href="https://ncatlab.org/nlab/revision/diff/symmetric+space/11">diff</a>, <a href="https://ncatlab.org/nlab/revision/symmetric+space/11">v11</a>, <a href="https://ncatlab.org/nlab/show/symmetric+space">current</a>