[render] Keith Packard, Design and Implementation of the X Rendering Extension, June, 2001, Usenix Annual Technical Conference, Usenix Association.
[xft] Keith Packard, The Xft Font Library: Architecture and Users Guide, October, 2001, XFree86 Technical Conference, The XFree86 Project, Inc., Usenix Association.
[css2] Bert Bos, Håkon Lie, Chris Lilley, and Ian Jacobs, Cascading Style Sheets, level 2 CSS2 Specification. W3C Recommendation, World Wide Web Consortium, May 12, 1998.
[xml] Robert Eckstien and Michel Casabianca, XML Pocket Reference, Second Edition, April 2001, O'Reilly.
[freetype] David Turner, The design of FreeType 2, 2000.
[mozilla] Mozilla Developer Documentation .
[pango] Pango Reference Manual , Owen Taylor.