diff --git a/brian-kernighan.md b/brian-kernighan.md
index 5aa759bbc..655c38f6f 100644
--- a/brian-kernighan.md
+++ b/brian-kernighan.md
@@ -5,7 +5,8 @@
 - [[go]] https://en.wikipedia.org/wiki/Brian_Kernighan
 - [[podcast]] https://www.youtube.com/watch?v=O9upVbGSBFo
   - with [[lex fridman]]
-- [[project]] [[c]] [[awk]] [[ampl]]
+- [[project]] [[c]] [[awk]] [[ampl]] [[unix]]
+  - [[ken thompson]] [[dennis ritchie]]
 
 
 [//begin]: # "Autogenerated link references for markdown compatibility"