1. St Clair A.K.; St Clair T.L. US Pat 4,603,061 1986.
2. Optically transparent/colorless polyimides;St Clair,1985
3. Essentially colorless polyimide film containing phenoxy-linked diamines;St Clair,1985
4. St Clair A.K.; St Clair T.L. Highly optically transparent/colorless aromatic polyimide film. US 4603061, 1985.