From 6ec66399f3b8abe5b273dc6105bd33673c72613e Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 3 Dec 2019 11:36:07 -0700
Subject: [PATCH] Link to a paper that describes step-61.

---
 doc/doxygen/references.bib     | 16 ++++++++++++++++
 examples/step-61/doc/intro.dox |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/doc/doxygen/references.bib b/doc/doxygen/references.bib
index 9fa65721b4..f52b9ae95e 100644
--- a/doc/doxygen/references.bib
+++ b/doc/doxygen/references.bib
@@ -332,6 +332,22 @@ MRREVIEWER = {Jose Luis Gracia},
   organization={Cambridge University Press}
 }
 
+
+% ------------------------------------
+% Step 61
+% ------------------------------------
+
+@incollection{Wang2019,
+  doi = {10.1007/978-3-030-22747-0_37},
+  url = {https://doi.org/10.1007/978-3-030-22747-0_37},
+  year = {2019},
+  publisher = {Springer International Publishing},
+  pages = {495--509},
+  author = {Zhuoran Wang and Graham Harper and Patrick O'Leary and Jiangguo Liu and Simon Tavener},
+  title = {deal.{II} Implementation of a Weak Galerkin Finite Element Solver for Darcy Flow},
+  booktitle = {Lecture Notes in Computer Science}
+}
+
 % ------------------------------------
 % Step 63
 % ------------------------------------
diff --git a/examples/step-61/doc/intro.dox b/examples/step-61/doc/intro.dox
index 65e017a7f5..b8b45dc282 100644
--- a/examples/step-61/doc/intro.dox
+++ b/examples/step-61/doc/intro.dox
@@ -2,6 +2,8 @@
 
 <i>
 This program was contributed by Zhuoran Wang.
+Some more information about this program, as well as more numerical
+results, are presented in @cite Wang2019 . 
 </i>
 
 <a name="Intro"></a>
-- 
2.39.5