diff --git a/TODO b/TODO
index 604426c..f1be1b6 100644
--- a/TODO
+++ b/TODO
@@ -12,3 +12,4 @@
     http://jsdoc.sourceforge.net/ !!! Doctool fuer Javascript !!!
     http://www.polyglotinc.com/AJAXscratch/
     http://zez.org/article/articleprint/46/ - vielleicht interessant -
+    http://www.php-faq.de/q/q-race-condition.html - interessant -