diff --git a/ayanova/src/api/gzutil.js b/ayanova/src/api/gzutil.js
index 33294525..f86e342e 100644
--- a/ayanova/src/api/gzutil.js
+++ b/ayanova/src/api/gzutil.js
@@ -451,6 +451,7 @@ export default {
   },
   ///////////////////////////////////////////////
   // Trim specific character from start and end
+  // https://stackoverflow.com/a/55292366/8939
   //
   trimSpecific: function trim(str, ch) {
     var start = 0,