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|00001007040310]]
* [[Embedded zettel or (external) material|00001007040320]] (""inline transclusion"")
* [[Reference via a footnote|00001007040330]]
* [[Reference via a citation key|00001007040340]]
* Put a [[mark|00001007040350]] within your zettel that you can reference later with a link.