diff --git a/research/security.mdwn b/research/security.mdwn
index d2eefc8b867ebab02426ac06a766c8af31ac9390..38e32ced3cc25b67f92d4a35b33bfaa086c241c2 100644
--- a/research/security.mdwn
+++ b/research/security.mdwn
@@ -3,7 +3,10 @@
 Research and development in security:
 
 * [Creepy - Geolocation OSINT Tool](http://www.geocreepy.com/) ([package](https://packages.debian.org/wheezy/creepy)).
-* [Qubes OS](https://www.qubes-os.org/).
+* [Qubes OS](https://www.qubes-os.org/):
+  * [Qubes - Debian Wiki](https://wiki.debian.org/Qubes).
+  * [i3 | Qubes OS](https://www.qubes-os.org/doc/i3/).
+  * [Qubes OS 3.2 [LWN.net]](https://lwn.net/Articles/705827/).
 * bitmask and LEAP.
 * port knocking.
 * hardened systems: apparmor, gradm2, firejail, seccomp, etc.