diff --git a/index.html b/index.html
index acb945b8b29dfb79ea0320e853ff1e0400ca2685..0e639e819641dd41bee57dbbc6d64cf9c5d4ba39 100644
--- a/index.html
+++ b/index.html
@@ -71,7 +71,7 @@
     </p>
     <hr>
     <p>
-      Created by <a href="http://gabrielecirulli.com" target="_blank">Gabriele Cirulli.</a> Based on <a href="https://itunes.apple.com/us/app/1024!/id823499224" target="_blank">1024 by Veewo Studio.</a>
+    Created by <a href="http://gabrielecirulli.com" target="_blank">Gabriele Cirulli.</a> Based on <a href="https://itunes.apple.com/us/app/1024!/id823499224" target="_blank">1024 by Veewo Studio</a> and conceptually similar to <a href="http://asherv.com/threes/" target="_blank">Threes by Asher Vollmer.</a>
     </p>
   </div>
 </body>