1. N.Y.C. Chu, in: H. Dürr (Ed.), Photochromism: Molecules and Systems, Elsevier, Amsterdam, 1990
2. R.J. Hovey, N.Y.C. Chu, P.G. Piusz, C.H. Fuchsman, US Patent 4 342 668 (1982)
3. R.C. Bertelson, in: G.H. Brown (Ed.), Photochromism: Techniques of Chemistry, vol. 3, Wiley/Interscience, New York, 1971
4. The Matrix Effect on the Thermal Reactions of Spirooxazine in Polymer Matrices
5. Perspectives in Photochromism: A Novel System Based on the 1,5-Electrocyclization of Heteroanalogous Pentadienyl Anions