http://www-cdr.stanford.edu/dynamic/...rs/motion1.pdf
http://www-cdr.stanford.edu/dynamic/...rs/motion2.pdf
https://docs.google.com/viewer?url=p.../US6977451.pdf
https://docs.google.com/viewer?url=p.../US6789305.pdf
https://docs.google.com/viewer?url=p.../US8664808.pdf
https://docs.google.com/viewer?url=p.../US5910691.pdf
https://docs.google.com/viewer?url=p.../US5751077.pdf



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