Refine external-libraries.txt
Refine external-libraries.txt

JabRef/jabref,JabRef/jabref,Siedlerchr/jabref,sauliusg/jabref,JabRef/jabref,sauliusg/jabref,JabRef/jabref,sauliusg/jabref,Siedlerchr/jabref,Siedlerchr/jabref,Siedlerchr/jabref,sauliusg/jabref