""[http://books.google.com/books?id=XH2IkLNuIsQC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false The Fiscus Judaicus and the Parting of the Ways".
""[http://books.google.com/books?id=XH2IkLNuIsQC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false El Fiscus Judaicus y la Separación de los Caminos".