diff --git a/csl/nuc-acid-res.csl b/csl/nuc-acid-res.csl
new file mode 100644
index 0000000000..c2be9d9f8d
--- /dev/null
+++ b/csl/nuc-acid-res.csl
@@ -0,0 +1,119 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<style xmlns="http://purl.org/net/xbiblio/csl" xml:lang="en" class="in-text" >
+  <info>
+    <title>Nucleic Acids Research Journal</title>
+    <id>http://www.zotero.org/styles/nuc-acid-res</id>
+    <link>http://www.zotero.org/styles/nuc-acid-res</link>
+    <author>
+      <name>Julian Onions</name>
+      <email>julian.onions@gmail.com</email>
+    </author>
+    <category term="numeric"/>
+    <updated/>
+    <summary>Nucleic Acids Research Journal style.</summary>
+    <source>http://www.oxfordjournals.org/nar/for_authors/msprep_submission.html</source>
+  </info>
+  <macro name="editor">
+    <names variable="editor" delimiter=", ">
+      <name  initialize-with="." name-as-sort-order="all" sort-separator=","
+	     delimiter=", " delimiter-precedes-last="always"/>
+      <label form="short" text-transform="lowercase" prefix=" (" suffix=")"/>
+    </names>
+  </macro>
+  <macro name="author">
+    <names variable="author">
+      <name name-as-sort-order="all" sort-separator="," initialize-with="."
+	    delimiter=", " and="text" delimiter-precedes-last="never"/>
+      <label form="short" prefix=" " suffix="." text-transform="lowercase"/>
+      <substitute>
+	<names variable="editor"/>
+	<text variable="title"/>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="access">
+    <group>
+      <text value="Available at:" suffix=" "/>
+      <text variable="URL"/>
+      <group prefix=" [" suffix="]">
+	<text term="accessed" text-transform="capitalize" suffix=" "/>
+	<date variable="accessed">
+	  <date-part name="month" suffix=" "/>
+	  <date-part name="day" suffix=", "/>
+	  <date-part name="year"/>
+	</date>
+      </group>
+    </group>
+  </macro>
+  <macro name="title">
+    <text variable="title"/>
+  </macro>
+  <macro name="publisher">
+    <group delimiter=", ">
+      <text variable="publisher"/>
+      <text variable="publisher-place"/>
+    </group>
+  </macro>
+  <macro name="cite-date">
+    <date variable="issued">
+      <date-part name="month" suffix=" "/>
+      <date-part name="day" suffix=", "/>
+      <date-part name="year"/>
+    </date>
+  </macro>
+  <citation>
+    <option name="collapse" value="citation-number"/>
+    <layout prefix="(" suffix=")" delimiter=", ">
+      <text variable="citation-number" />
+    </layout>
+  </citation>
+  <bibliography>
+    <option name="hanging-indent" value="true"/>
+    <option name="et-al-min" value="11"/>
+    <option name="et-al-use-first" value="1"/>
+    <layout suffix=".">
+      <text variable="citation-number" suffix=". "/>
+      <text macro="author"/>
+      <text macro="cite-date" prefix=" (" suffix=")"/>
+      <choose>
+	<if type="book">
+	  <group delimiter=" " prefix=" ">
+	    <text macro="title"/>
+	    <text variable="edition" suffix=" ed."/>
+	    <text macro="editor" />
+	    <text macro="publisher" />
+	  </group>
+	</if>
+	<else-if type="chapter">
+	  <text macro="title" prefix=" " suffix=". "/>
+	  <group class="container" prefix=" " delimiter=" " suffix=".">
+	    <text term="in" text-transform="capitalize"/>
+	    <group delimiter=", ">
+	      <text macro="editor"/>
+	      <text variable="container-title" font-style="italic"/>
+	      <text variable="collection-title" prefix=" " suffix="."/>
+	    </group>
+	  </group>
+	  <group suffix="." delimiter=", ">
+	    <text macro="publisher" prefix=" "/>
+	    <text variable="volume" prefix="Vol. "/>
+	    <group>
+	      <label variable="page" suffix=". " form="short"/>
+	      <text variable="page"/>
+	    </group>
+	  </group>
+	</else-if>
+	<else>
+	  <text macro="title" prefix=" " suffix="."/>
+	  <group class="container" delimiter=", " prefix=" " suffix=".">
+	    <text variable="container-title" form="short" font-style="italic"/>
+	    <text variable="volume" font-weight="bold"/>
+	    <text variable="page"/>
+	    <text variable="DOI"/>
+	  </group>
+	</else>
+      </choose>
+      <text prefix=" " macro="access" />
+    </layout>
+  </bibliography>
+</style>
diff --git a/csl/pnas.csl b/csl/pnas.csl
index 44a44b8b22..de4a3574ca 100644
--- a/csl/pnas.csl
+++ b/csl/pnas.csl
@@ -69,11 +69,8 @@
     <option name="hanging-indent" value="true"/>
     <option name="et-al-min" value="5"/>
     <option name="et-al-use-first" value="1"/>
-    <sort>
-      <key macro="author"/>
-      <key variable="title"/>
-    </sort>
     <layout suffix=".">
+      <text variable="citation-number" suffix=". "/>
       <text macro="author"/>
       <date variable="issued" prefix=" (" suffix=")">
 	<date-part name="year"/>