Typographic Design Patterns and Best Practices
http://www.smashingmagazine.com/2009/08/20/typographic-design-survey-best-practices-from-the-best-blogs/

Martin, Michael
Smashing
2009

Abstract:

To find typographic design patterns that are common in modern Web design and to resolve some common typographic issues, we conducted extensive research on 50 popular websites on which typography matters more than usual (or at least should matter more than usual). We’ve chosen popular newspapers, magazines and blogs as well as various typography-related websites. We’ve carefully analyzed their typography and style sheets and searched for similarities and differences.