1. The Greek grammar of Roger Bacon and a fragment of his Hebrew grammar;Bacon,1902
2. Le sens de la langue et des langues chez Roger Bacon;Bourgain,1986
3. Cartesian linguistics;Chomsky,1966
4. Roger Bacon and his search for a universal science;Easton,1952
5. Una et eadem: some observations on Roger Bacon's Greek grammar;Hovdhaugen,1990