diff --git a/open/exec.go b/open/exec.go
index cc37339..1b0e713 100644
--- a/open/exec.go
+++ b/open/exec.go
@@ -6,6 +6,9 @@ import (
 	"os/exec"
 )
 
+// http://sources.debian.net/src/xdg-utils/1.1.0~rc1%2Bgit20111210-7.1/scripts/xdg-open/
+// http://sources.debian.net/src/xdg-utils/1.1.0~rc1%2Bgit20111210-7.1/scripts/xdg-mime/
+
 func open(input string) *exec.Cmd {
 	return exec.Command("xdg-open", input)
 }