diff --git a/doc/source/api.rst b/doc/source/api.rst
index 7ea4b48fb..a45f375ae 100644
--- a/doc/source/api.rst
+++ b/doc/source/api.rst
@@ -563,7 +563,9 @@ Operations and Utility Functions
    :toctree: _apidoc/
    :template: class.rst
 
+   ~pytransform3d.transform_manager.TransformGraphBase
    ~pytransform3d.transform_manager.TransformManager
+   ~pytransform3d.transform_manager.TemporalTransformManager
 
 
 :mod:`pytransform3d.editor`
diff --git a/pytransform3d/transform_manager/_transform_graph_base.py b/pytransform3d/transform_manager/_transform_graph_base.py
index cea894755..aa58e67f8 100644
--- a/pytransform3d/transform_manager/_transform_graph_base.py
+++ b/pytransform3d/transform_manager/_transform_graph_base.py
@@ -7,7 +7,7 @@
 
 
 class TransformGraphBase(abc.ABC):
-    """Base class for all trees of rigid transformations.
+    """Base class for all graphs of rigid transformations.
 
     Parameters
     ----------