1. (a) Molecular Switches; Feringa, B. L.; Browne, W. R., Eds.; Wiley: Weinheim, 2011, 2nd ed.
2. (b) Minkin V. I. Russ. Chem. Bull., Int. Ed. 2008, 57, 687.
3. [Izv. Akad. Nauk, Ser. Khim. 2008, 673.] (c) Organic Photochromic and Thermochromic Compounds; Crano, J. C.; Guglielmetti, R. J., Eds.; Plenum Press: New York, 1999.
4. (a) Andreasson, J.; Pischel, U. Chem. Soc. Rev. 2015, 44, 1053.
5. (b) Velema, W. A.; Szymanski, W.; Feringa, B. L. J. Am. Chem. Soc. 2014, 136, 2178.