1. Electrochromic tungsten oxide films: review of progress 1993–1998;Granqvist;Sol. Energy Mater. Sol. Cells,2000
2. P.M.S. Monk, The Viologens: Physicochemical Properties, Synthesis and Applications of the Salts of 4,4%-Bipyridine, John Wiley and sons, Inc., New York; Wiley-VCH, Weinheim, England, 1998, ISBN-10: 0471986038 (Chapter 9).
3. P.M.S. Monk, R.J. Mortimer, D.R. Rosseinsky, Electrochromism, Cambridge University Press, Cambridge; Wiley-VCH, Weinheim, England, 2007, ISBN-10: 0521822696 (Chapter 8).
4. Electrochromic paper: utility of electrochromes incorporated in paper;Monk;Electrochim. Acta,2001
5. The influence of operating voltage and cell gap on the performance of a solution-phase electrochromic device containing HV and TMPD;Ho;Solid State Ion.,2003