diff --git a/research.md b/research.md
index 7020ec73f..291be768f 100644
--- a/research.md
+++ b/research.md
@@ -4,6 +4,9 @@
 - a [[list]].
   - [[bridges]]
   - [[siphons]]
+  - [[ctzn]]
+  - [[graphs]]
+  - [[category theory]]
   - [[public utility]]
   - [[protopoi]]
   - [[social web protocols]]