-%.pdf: %.tex
-       perl -p -e 's/©//' refs.bib > refs-cleaned.bib
-       perl -0pe 's/,\s+(file|abstract) = \{.*?\}(,\n|\n)/\2/sg' refs-cleaned.bib |sponge refs-cleaned.bib
-       recode -d u8..ltex < refs-cleaned.bib > refs-processed.bib
+refs-processed.bib: 
+       perl -p -e 's/©//' refs.bib > refs-processed.bib
+       perl -0pe 's/,\s+(file|abstract) = \{.*?\}(,\n|\n)/\2/sg' refs-processed.bib |sponge refs-processed.bib
+       recode -d u8..ltex < refs-processed.bib | sponge refs-processed.bib
+
+%.pdf: %.tex refs-processed.bib