diff --git a/content/notes/think-writing.md b/content/notes/think-writing.md
index 7a0d08594..328291166 100644
--- a/content/notes/think-writing.md
+++ b/content/notes/think-writing.md
@@ -85,4 +85,6 @@ Changed docker container to use iroha-burrow instead of haydens own docker image
 
 # 8/12
 
-https://doi.org/10.3390/admsci12030096
\ No newline at end of file
+https://doi.org/10.3390/admsci12030096
+https://doi.org/10.1016/j.cities.2021.103325
+