Index: trunk/doc/release.2015/ps1.datasystem/Makefile
===================================================================
--- trunk/doc/release.2015/ps1.datasystem/Makefile	(revision 39974)
+++ trunk/doc/release.2015/ps1.datasystem/Makefile	(revision 39975)
@@ -2,5 +2,5 @@
 
 DO_PDFLATEX = 1
-DO_BIBTEX = 0
+DO_BIBTEX = 1
 
 help:
Index: trunk/doc/release.2015/ps1.datasystem/datasystem.tex
===================================================================
--- trunk/doc/release.2015/ps1.datasystem/datasystem.tex	(revision 39974)
+++ trunk/doc/release.2015/ps1.datasystem/datasystem.tex	(revision 39975)
@@ -1824,6 +1824,6 @@
 
 \bibliographystyle{apj}
-%\bibliography{lib}{}
-\input{datasystem.bbl}
+\bibliography{lib}{}
+%\input{datasystem.bbl}
 
 \appendix