diff --git a/TipsKeyboard.md b/TipsKeyboard.md
index 20085f5e..4bd467ee 100644
--- a/TipsKeyboard.md
+++ b/TipsKeyboard.md
@@ -2,6 +2,9 @@
 
 # Personnalisation du keymap
 
+[german umlauts](https://www.blunix.org/using-german-umlauts-on-us-layout-keyboards/)
+[ISO latin1 table](http://cs.stanford.edu/people/miles/iso8859.html)
+
 ## TTY
 
 ~~~