diff --git a/Distributed_Systems/site_reliability_engineering.md b/Distributed_Systems/site_reliability_engineering.md
index 120e1fc..03ca544 100644
--- a/Distributed_Systems/site_reliability_engineering.md
+++ b/Distributed_Systems/site_reliability_engineering.md
@@ -10,7 +10,7 @@
 
 ## Storage
 - Colossus
-    - successor of a GFS (Google File System)[Gheo03]
+    - successor of a GFS (Google File System)[Ghe03]
     - comparable to *Lustre* or *Hadoop Distributed File System* (HDFS)
 
 ## DB