From c808c85a443638f5195e22d7340e9b8dc4c1bf1d Mon Sep 17 00:00:00 2001
From: adam3smith <karcher@u.northwestern.edu>
Date: Mon, 3 Mar 2014 17:09:00 -0700
Subject: [PATCH] add DOI to Elsevier Harvar and Elsevier (with titles). That's
 the two styles where the DOI is consistently encouraged in the instructions
 for authors

---
 elsevier-harvard.csl     | 7 +++++--
 elsevier-with-titles.csl | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/elsevier-harvard.csl b/elsevier-harvard.csl
index b9707d599a..43957428e9 100644
--- a/elsevier-harvard.csl
+++ b/elsevier-harvard.csl
@@ -91,7 +91,10 @@
   </macro>
   <macro name="access">
     <choose>
-      <if type="webpage">
+      <if variable="DOI">
+        <text variable="DOI" prefix="doi:"/>
+      </if>
+      <else-if type="webpage">
         <group delimiter=" ">
           <text value="URL"/>
           <text variable="URL"/>
@@ -104,7 +107,7 @@
             </date>
           </group>
         </group>
-      </if>
+      </else-if>
     </choose>
   </macro>
   <macro name="title">
diff --git a/elsevier-with-titles.csl b/elsevier-with-titles.csl
index 685d88aeb9..9829117611 100644
--- a/elsevier-with-titles.csl
+++ b/elsevier-with-titles.csl
@@ -125,6 +125,7 @@
           </group>
         </else>
       </choose>
+      <text variable="DOI" prefix=". doi:"/>
     </layout>
   </bibliography>
 </style>