Photochromic properties of composite films of thermally irreversible diarylethenes and fulgimides in polytetrafluoroethylene matrix - O. I. Kobeleva; T. M. Valova; A. O. Ait; V. A. Barachevsky; K. P. Grytsenko; V. F. Machulin; M. M. Krayushkin (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2011)