1. Photochromism,1971
2. New developments in photochromic polymers;Smets;J. Poly. Sci.,1975
3. New developments in photochromic polymers;Smets;J. Poly. Sci.,1974
4. Novel polyviologens: photochromic Redox polymers with film-forming properties;Simon Myron;J. Poly. Sci.,1975