diff --git a/walled gardens.md b/walled gardens.md
index 718ac44cd..365eb3b62 100644
--- a/walled gardens.md	
+++ b/walled gardens.md	
@@ -6,6 +6,9 @@
     - [[facebook]]
     - [[twitter]]
     - [[instagram]]
+  - [[knowledge]]
+    - [[elsevier]]
+    - [[jstor]]
 - [[in flancia there are no walled gardens]]