The Mobile Web Explained
http://www.searchandgo.com/articles/internet/mobile-web-explained.php
  peer-reviewed

Search and Go
2007

Abstract:

With already over three times the number of mobile phones on the planet than desktop or portable computers the Web was destined to go mobile. For developers versed in standards-compliant markup the most immediate and obvious opportunity to render an existing site for the mobile web is via a the addition of and alternate stylesheet.