
These are some of links that I found during my research.
Information on Christopher Alexander
General Information
http://www.math.utsa.edu/~salingar/Chris.text.html
http://deu.archinform.net/arch/3409.htm
Pattern Language Repository from the Bauhaus University Weimar
http://www.uni-weimar.de/architektur/InfAR/lehre/Entwurf/Patterns/patterns.html
Christopher Alexander's Website
Website by Tom Erickson with very up-to-date link collection.
http://www.visi.com/~snowfall/InteractionPatterns.html
hcipatterns.org
http://hillside.net/patterns/writing/patternwritingpaper.htm
Case Study about the Yahoo! Pattern Library
http://www.leacock.com/patterns/
Comparative Analysis of Web Design Patterns and Pattern Collections
http://www.ui-designpatterns.org/tr/ComparativeAnalysisOfCollections.pdf