diff --git a/node.md b/node.md
index 07164cdd6..335ab89be 100644
--- a/node.md
+++ b/node.md
@@ -2,9 +2,12 @@
 
 - Nodes and edges are the heart of the [[agora]], which is in essence a [[distributed knowledge graph]].
 - Nodes are made of one or more [[subnode]]s volunteered by different [[user]]s and [[source]]s.
+- Sources are those available through an [[agora client]].
 
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [agora]: agora "Agora"
+[distributed knowledge graph]: distributed-knowledge-graph "Distributed Knowledge Graph"
 [subnode]: subnode "Subnode"
+[agora client]: agora-client "Agora Client"
 [//end]: # "Autogenerated link references"
\ No newline at end of file