diff --git a/symptom_ex_process/Makefile b/symptom_ex_process/Makefile
index 42cebbc..c3ac12a 100644
--- a/symptom_ex_process/Makefile
+++ b/symptom_ex_process/Makefile
@@ -18,3 +18,7 @@ paper:	paper.tex symptom_ex_process_paper.tex $(SOURCE)
 symptom_ex_process_paper.tex: symptom_ex_process.tex paper.tex $(SOURCE)
 	cat symptom_ex_process.tex | sed 's/symptom_ex_process\///'   > symptom_ex_process_paper.tex
 
+
+bib: $(SOURCE)	
+	bibtex paper
+