diff --git a/README.md b/README.md
index 188558a7a282a6de959e3f16fcfa6fabc2436398..64ae3a4f452895e0a7fb013ae1ce5a4bf61a39f7 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,8 @@ Examples
 Jupyter notebooks demonstrating mbtrack2 features are available in the example folder and can be opened online using google colab:
 + mbtrack2 base features [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_demo.ipynb)
 + dealing with RF cavities and longitudinal beam dynamics [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_cavity_resonator.ipynb)
++ collective effects [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_collective_effects.ipynb)
++ bunch by bunch feedback [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_BxB_FB.ipynb)
 
 References
 ----------
diff --git a/mbtrack2/tracking/feedback.py b/mbtrack2/tracking/feedback.py
index 5e4e5f22949078e7d5b32be8527faefbb74d8c0a..b3633c5aec7e710315bdef892a222adfb79e936c 100644
--- a/mbtrack2/tracking/feedback.py
+++ b/mbtrack2/tracking/feedback.py
@@ -79,7 +79,7 @@ class FIRDamper(Element):
         Gain of the FIR filter.
     phase : float
         Phase of the FIR filter in [degree].
-    meas_error : float, optional
+    bpm_error : float, optional
         RMS measurement error applied to the computed mean position.
         Unit is [m] if the plane is "x" or "y" and [s] if the plane is "s".
         The default is None.