diff --git a/governing the commons.md b/governing the commons.md
index 895a6650f..8e01140f1 100644
--- a/governing the commons.md	
+++ b/governing the commons.md	
@@ -4,4 +4,7 @@
 	- [[wp]] https://en.wikipedia.org/wiki/Special:BookSources/978-0-521-40599-7
 	- [[hypothesis]] https://via.hypothes.is/https://www.actu-environnement.com/media/pdf/ostrom_1990.pdf
 		- [[go]] [[hypothesis]]
-	- [[google books]] https://books.google.ch/books?id=4xg6oUobMz4C&printsec=frontcover&dq=isbn:9780521405997&hl=en&sa=X&ved=2ahUKEwiU5ZfmhczwAhWEuaQKHVnnCEwQ6AEwAHoECAAQAg#v=onepage&q&f=false
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+	- [[google books]] https://books.google.ch/books?id=4xg6oUobMz4C&printsec=frontcover&dq=isbn:9780521405997&hl=en&sa=X&ved=2ahUKEwiU5ZfmhczwAhWEuaQKHVnnCEwQ6AEwAHoECAAQAg#v=onepage&q&f=false
+
+https://twitter.com/flancian/status/1401146586013618183
+https://twitter.com/flancian/status/1400884449949126663
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