--- a/macros.xml	Wed Mar 18 16:43:50 2015 -0400
+++ b/macros.xml	Tue Apr 21 15:05:45 2015 -0400
@@ -7,7 +7,37 @@
     </xml>
     <xml name="citations">
         <citations>
+            <citation type="bibtex">
+                @misc{SAM_def,
+                title={Definition of SAM/BAM format},
+                url = {https://samtools.github.io/hts-specs/SAMv1.pdf},}
+            </citation>
             <citation type="doi">10.1093/bioinformatics/btp352</citation>
+            <citation type="doi">10.1093/bioinformatics/btr076</citation>
+            <citation type="doi">10.1093/bioinformatics/btr509</citation>
+            <citation type="bibtex">
+                @misc{Danecek_et_al,
+                Author={Danecek, P., Schiffels, S., Durbin, R.},
+                title={Multiallelic calling model in bcftools (-m)},
+                url = {http://samtools.github.io/bcftools/call-m.pdf},}
+            </citation>
+            <citation type="bibtex">
+                @misc{Durbin_VCQC,
+                Author={Durbin, R.},
+                title={Segregation based metric for variant call QC},
+                url = {http://samtools.github.io/bcftools/rd-SegBias.pdf},}
+            </citation>
+            <citation type="bibtex">
+                @misc{Li_SamMath,
+                Author={Li, H.},
+                title={Mathematical Notes on SAMtools Algorithms},
+                url = {http://www.broadinstitute.org/gatk/media/docs/Samtools.pdf},}
+            </citation>
+            <citation type="bibtex">
+                @misc{SamTools_github,
+                title={SAMTools GitHub page},
+                url = {https://github.com/samtools/samtools},}
+            </citation>
         </citations>
     </xml>
     <xml name="version_command">
@@ -18,4 +48,23 @@
             <exit_code range="1:" level="fatal" description="Error" />
         </stdio>
     </xml>
+    <token name="@no-chrom-options@">
+-----
+
+.. class:: warningmark
+
+**No options available? How to re-detect metadata**
+
+If you see a &quot;No options available&quot; within the &quot;**Select references (chromosomes and contigs) you would like to restrict bam to**&quot; drop down, you need to re-detect metadata for the dataset you are trying to process. To do this follow these steps:
+
+1. Click on the **pencil** icon adjacent to the dataset in the history
+2. A new menu will appear in the center pane of the interface
+3. Click **Datatype** tab
+4. Set **New Type** to **BAM**
+5. Click **Save**
+
+The medatada will be re-detected and you will be able to see the list of reference sequences in the &quot;**Select references (chromosomes and contigs) you would like to restrict bam to**&quot; drop-down.
+
+    </token>
+
 </macros>