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/density-of-states/index.pdc | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'content/know/concept/density-of-states/index.pdc')

diff --git a/content/know/concept/density-of-states/index.pdc b/content/know/concept/density-of-states/index.pdc
index 195ac2a..438a0d6 100644
--- a/content/know/concept/density-of-states/index.pdc
+++ b/content/know/concept/density-of-states/index.pdc
@@ -154,3 +154,6 @@ so a finite value can be chosen.
 1.  H. Gould, J. Tobochnik,
     *Statistical and thermal physics*, 2nd edition,
     Princeton.
+2.  B. Van Zeghbroeck,
+    [Principles of semiconductor devices](https://ecee.colorado.edu/~bart/book/book/chapter2/ch2_4.htm), 2011,
+    University of Colorado.
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