diff --git a/BASIC-Nomic.txt b/BASIC-Nomic.txt
index 0fd6222..4636793 100644
--- a/BASIC-Nomic.txt
+++ b/BASIC-Nomic.txt
@@ -10,6 +10,7 @@ turns, points, rules, events..
 ---
 
 names are alphanumeric with periods allowed
+(based on https://esolangs.org/wiki/ZeptoBasic)
 
 label name
 goto name