Check out this very well written and researched paper from the Wilhelm
Schickard Institute for Computer Science in Germany.
http://tobias-lib.uni-tuebingen.de/volltexte/2010/4710/pdf/report_spruth_2010.pdf
(Don't worry. It's written in English. :-) )
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
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