Source of Riemersma

[[Dither]] > [[FloydSteinberg]]

-  Thiadmer Riemersma, ''A Balanced Dithering Technique'', C/C++ User's Journal, vol. 16 issue 12, December 1998
--  http://portal.acm.org/citation.cfm?id=306490.306494

- Riemersma dither
--  https://www.compuphase.com/riemer.htm