diff --git a/an invitation to applied category theory.md b/an invitation to applied category theory.md
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--- a/an invitation to applied category theory.md	
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@@ -1,4 +1,6 @@
 # An Invitation to Applied Category Theory
 
 - a [[book]]
-  - [[fong]] [[spivak]]
+  - [[brendan fong]] [[david spivak]]
+  - [[pull]] [[seven sketches in compositionality]]
+  - [[go]] https://arxiv.org/abs/1803.05316