From 6f560e87fa5cd10852e073adbedfc3d46e5da8bb Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sat, 13 Mar 2021 21:50:05 +0100
Subject: Expand knowledge base

---
 content/know/concept/no-cloning-theorem/index.pdc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'content/know/concept/no-cloning-theorem')

diff --git a/content/know/concept/no-cloning-theorem/index.pdc b/content/know/concept/no-cloning-theorem/index.pdc
index e253464..38bf50c 100644
--- a/content/know/concept/no-cloning-theorem/index.pdc
+++ b/content/know/concept/no-cloning-theorem/index.pdc
@@ -68,4 +68,9 @@ which implies that such a general cloning machine cannot ever exist.
 
 
 ## References
-1.  N. Brunner, *Quantum information theory: lecture notes*, 2019.
+1.  N. Brunner,
+    *Quantum information theory: lecture notes*,
+    2019, unpublished.
+2.  J.B. Brask,
+    *Quantum information: lecture notes*,
+    2021, unpublished.
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