diff --git a/less/responsive.less b/less/responsive.less
index b05251ae67f27f2b0f3d415c1cf838fd759ecc37..7cfaf80b9e26f7ee7a6884c18c6c6f90919924ed 100644
--- a/less/responsive.less
+++ b/less/responsive.less
@@ -16,6 +16,7 @@
 
 // IE10 Metro responsive
 // Required for Windows 8 Metro split-screen snapping with IE10
+// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
 
 @-ms-viewport{
   width: device-width;