This is purely subjective, but Google is the only one that links to the Netlib 'real' LAPACK, straight to the file/documentation in question. The others have mixtures of Java packages and other examples...
Basically, but you're getting the opinion of a random person on the internet :). The third result is the 'real' one (the top two are unit tests for the named function.
From what I recall, it was also the most programmer-friendly search engine at the time.
http://www.bing.com/search?q=DGGEVX
http://blekko.com/ws/DGGEVX
http://duckduckgo.com/?q=DGGEVX
http://www.google.com/#q=DGGEVX
This is purely subjective, but Google is the only one that links to the Netlib 'real' LAPACK, straight to the file/documentation in question. The others have mixtures of Java packages and other examples...