Munzner, Visualization Analysis and Design, Chapter 10.1-10.3
Color Use Guidelines for Mapping and Visualization. Cynthia A. Brewer. Proceedings of the Section on Statistical Graphics, American Statistical Association, Alexandria VA. pp. 55-60. 1999.
See also: Colorbrewer: Color Advice for Maps
Rainbow Color Map (Still) Considered Harmful. D. Borland and R. Taylor. Computer Graphics and Applications, 27(2), pp. 14-17, 2007.