Imagining the Blogosphere: An Introduction to the Imagined Community of Instant Publishing
http://blog.lib.umn.edu/blogosphere/imagining_the_blogosphere.html

Lampa, Graham
Into the Blogosphere
2004

Abstract:

Blogs above the waterline—those which are frequently updated, widely read, and consistently linked—may represent the conception of blogs in the public mind, but they are not representative of blogs in general.