1. N.K. Sheridon, Twisting ball display, US Patent No. 4,126,854, November 21, 1978.
2. D. Tsuda, Characterization of bichromal ball properties, Technical Report, Fuji Xerox Imaging Science and Technology Lab, 1995.
3. R. Berker, Intégration des équations du mouvement d'un fluide visqueux incompressible, in: Handbuch der Physik, Vol. VIII/2, Springer, Berlin, 1955–1984, pp. 21–216.
4. J.R. Melcher, Continuum Electromechanics, MIT Press, Cambridge, MA, 1981, p. 7.36.
5. J.M. Crowley, E.A. Richley, N.K. Sheridon, Method and apparatus for fabricating bichromal balls for a twisting ball display, US Patent No. 5,262,098, November 16, 1993.