His chief work, the Pugio Fidei, was lost for a long time, but was finally brought to light by Justus Scaliger, and edited by Joseph de Voisin of the Sorbonne (d.
This work was used by Porchetus de Salvaticis at the beginning of the 14th century in his Victoria Porcheti adversus impios Hebreos [REF] (printed 1520), by Hieronymus de Sancta Fide in his Hebraeomastix[REF] and elsewhere, and was plagiarized by Petrus Galatinus.