From 9657833b115c8a61509295d2296c6f89e81fd219 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Fri, 28 May 2021 15:27:37 +0200
Subject: Improve citations

---
 content/know/concept/toffoli-gate/index.pdc | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'content/know/concept/toffoli-gate/index.pdc')

diff --git a/content/know/concept/toffoli-gate/index.pdc b/content/know/concept/toffoli-gate/index.pdc
index da5f2a5..f3ab0ba 100644
--- a/content/know/concept/toffoli-gate/index.pdc
+++ b/content/know/concept/toffoli-gate/index.pdc
@@ -91,3 +91,10 @@ $$\begin{aligned}
     &= c_{000} \ket{000} + c_{001} \ket{001} + c_{010} \ket{010} + c_{011} \ket{011} \\
     &\quad\,\, c_{100} \ket{100} + c_{101} \ket{101} + c_{111} \ket{110} + c_{110} \ket{111}
 \end{aligned}$$
+
+
+
+## References
+1.  J.S. Neergaard-Nielsen,
+    *Quantum information: lectures notes*,
+    2021, unpublished.
-- 
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