An important aspect of knowledge work is to interconnect your zettel as well as provide links to (external) material.

There are several kinds of references that are allowed in Zettelmarkup:

• Links to other zettel or to (external) material
• Embedded zettel or (external) material (“inline transclusion”)
• Reference via a footnote
• Reference via a citation key
• Put a mark within your zettel that you can reference later with a link.