diff --git a/content/notes/think-writing.md b/content/notes/think-writing.md
index f33474f5d..858f942a7 100644
--- a/content/notes/think-writing.md
+++ b/content/notes/think-writing.md
@@ -102,3 +102,13 @@ who generates the keys for a new node?
 
 what if a node removes itself
 
+Implemented a test to remove a node. 
+
+What about forking. do you remove a group of nodes? 
+
+https://eprints.soton.ac.uk/415083
+https://arxiv.org/abs/2102.10006
+https://arxiv.org/abs/1910.08547
+https://scholar.archive.org/work/uf7vmdzi7na5dazrh2jlhvuhr4/access/wayback/https://www.persistent.com/wp-content/uploads/2017/04/WP-Understanding-Blockchain-Consensus-Models.pdf?pdf=Understanding-Blockchain-Consensus-Models
+https://ieeexplore.ieee.org/abstract/document/9947249/
+