diff --git a/content/zettels/multivariable_control.md b/content/zettels/multivariable_control.md
index c4259d3..e8e49af 100644
--- a/content/zettels/multivariable_control.md
+++ b/content/zettels/multivariable_control.md
@@ -7,11 +7,9 @@ draft = false
 Tags
 : [Norms]({{< relref "norms.md" >}})
 
-A very nice book about Multivariable Control is (<a href="#citeproc_bib_item_1">Skogestad and Postlethwaite 2007</a>)
+A very nice book about Multivariable Control is <skogestad07_multiv_feedb_contr>
 
 
 ## Bibliography {#bibliography}
 
-<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
-  <div class="csl-entry"><a id="citeproc_bib_item_1"></a>Skogestad, Sigurd, and Ian Postlethwaite. 2007. <i>Multivariable Feedback Control: Analysis and Design - Second Edition</i>. John Wiley.</div>
-</div>
+<./biblio/references.bib>