diff --git a/content/notes/think-writing.md b/content/notes/think-writing.md
index aa51af048..d102e7a67 100644
--- a/content/notes/think-writing.md
+++ b/content/notes/think-writing.md
@@ -151,3 +151,4 @@ ethereum whitepaper
 
 Yesterday I got one iroha node running by itself in a docker container and was able to make transactions and queries using a python script. This morning I'll try to get a few nodes to interact together. And In the afternoon I will do some reading about CPRs and governance.
 
+doi: 10.1109/TEM.2020.3003565: Permissionless and Permissioned, Technology-Focused and Business Needs-Driven: Understanding the Hybrid Opportunity in Blockchain Through a Case Study of Insolar. 
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