1. R. Tamura , Y.Uchida and K.Suzuki , in Handbook of Liquid Crystals , ed. J. W. Goodby , P. J. Collings , T. Kato , C. Tschierske , H. F. Gleeson and P. Raynes , Wiley-VCH , Weinheim , 2014 , vol. 8, pp. 837–864
2. Stable radicals: fundamentals and applied aspects of odd-electron compounds , ed. R. G. Hicks , John Wiley & Sons , Chichester , 2010
3. Functional Organic Materials: Syntheses, Strategies and Applications , ed. T. J. J. Muller and U. H. F. Bunz , Wiley-VCH , Weinheim , 2007
4. Smectic E, C and A free radicals