diff --git a/content/zettels/integral_force_feedback.md b/content/zettels/integral_force_feedback.md
index bd74a06..f65912f 100644
--- a/content/zettels/integral_force_feedback.md
+++ b/content/zettels/integral_force_feedback.md
@@ -10,4 +10,4 @@ Tags
 
 ## Self-Sensing for perfect collocation {#self-sensing-for-perfect-collocation}
 
-This can be done with a [Voice Coil Actuator]({{< relref "voice_coil_actuators.md" >}}) (see <verma20_perfec_colloc_using_self_sensin_elect_actuat>) or with a [Piezoelectric Actuator]({{< relref "piezoelectric_actuators.md" >}}) (see <jansen19_activ_dampin_dynam_struc_using>).
+This can be done with a [Voice Coil Actuator]({{< relref "voice_coil_actuators.md" >}}) (see <verma20_perfec_colloc_using_self_sensin_elect_actuat>) or with a [Piezoelectric Actuator]({{< relref "piezoelectric_actuators.md" >}}) (see ebib:jansen19_activ_dampin_dynam_struc_using).