1. N-acyl polyimides of polycarboxylic acids;Flory,1951
2. Polyimides of pyromellitic acid;Edwards,1955
3. Method of preparing polyimides,1962
4. Polyimide sulfones, method and articles made therefrom;Gallucci,2006
5. Polyimides: Thermally stable polymers;Bessonov,1987