Ten Tips to the Top of Google - see item #7. <http://www.searchenginewatch.com/searchday/article.php/2198931>

Design & Search Engine Optimisation - see item #2.

http://www.abakus-internet-marketing.de/en/seo-tutorial/design.htm

Search Engine Marketing 101: What Search Engines See When They Visit Your Web Site http://www.searchengineworkshops.com/articles/SEO101.html

Some search-engine related articles supporting “clear links”:
http://www.bigmouthmedia.com/search_engine_information/optimisation_accessibility/

Google Search Engine Optimization on a Budget
http://websearch.about.com/od/keywordsandphrases/a/google_seo.htm