Modified reference to notebook
@@ -63,7 +63,7 @@ The last example shows how to run it on a few observations with a rectangular re
.. plot:: background/make_rectangular_reflected_background.py
:include-source:
-:ref:`tutorials` that show an example using ``gammapy.background.ReflectedBackgroundEstimator``
+The following notebook shows an example using ``gammapy.background.ReflectedBackgroundEstimator``
to perform a spectral extraction and fitting:
* :gp-notebook:`spectrum_analysis`
