add step-34 DOI

diff --git a/examples/step-34/doc/intro.dox b/examples/step-34/doc/intro.dox
index 0dce09476353c1ead7259276b67ae5e5a2dfab3e..7fc4aa661ae35e1e45dcd437ce5255018de3045d 100644 (file)
--- a/examples/step-34/doc/intro.dox
+++ b/examples/step-34/doc/intro.dox
@@ -4,6 +4,8 @@
 Gratton for pointing out what the exact solution should have been in
 the three dimensional case).  </i>
 
+@dealiiTutorialDOI{10.5281/zenodo.495473,https://zenodo.org/badge/DOI/10.5281/zenodo.495473.svg}
+
 <a name="Intro"></a>
 
 <h1>Introduction</h1>