diff --git a/content/article/kwakernaak93_robus_contr_h_tutor_paper.md b/content/article/kwakernaak93_robus_contr_h_tutor_paper.md
index 9992859..7bab37c 100644
--- a/content/article/kwakernaak93_robus_contr_h_tutor_paper.md
+++ b/content/article/kwakernaak93_robus_contr_h_tutor_paper.md
@@ -1,5 +1,5 @@
 +++
-title = "Robust control and $\mathcal{H}_$-optimization - Tutorial paper"
+title = "Robust control and $\mathcal{H}_\infty$ optimization - Tutorial paper"
 author = ["Thomas Dehaeze"]
 draft = false
 +++
@@ -8,7 +8,7 @@ Tags
 : [H Infinity Control]({{< relref "h_infinity_control" >}}), [Weighting Functions]({{< relref "weighting_functions" >}})
 
 Reference
-: ([Kwakernaak 1993](#orged0978c))
+: ([Kwakernaak 1993](#org94b92a2))
 
 Author(s)
 : Kwakernaak, H.
@@ -19,4 +19,4 @@ Year
 
 ## Bibliography {#bibliography}
 
-<a id="orged0978c"></a>Kwakernaak, Huibert. 1993. “Robust Control and H$infty$-Optimization - Tutorial Paper.” _Automatica_ 29 (2):255–73. <https://doi.org/10.1016/0005-1098(93)>90122-a.
+<a id="org94b92a2"></a>Kwakernaak, Huibert. 1993. “Robust Control and H$infty$-Optimization - Tutorial Paper.” _Automatica_ 29 (2):255–73. <https://doi.org/10.1016/0005-1098(93)>90122-a.