diff --git a/content/zettels/active_damping.md b/content/zettels/active_damping.md
index a2567d3..5edf453 100644
--- a/content/zettels/active_damping.md
+++ b/content/zettels/active_damping.md
@@ -15,5 +15,3 @@ There are two main control architecture to actively damp structures:
 The idea is to apply a force proportional to the velocity (either relative or inertial) of the structure.
 
 These are usually applied in a collocated way, meaning that the actuator and sensors are collocated (fixed to the same DoF), in order to have guaranteed stability.
-
-<./biblio/references.bib>