http://mechsys4.me.udel.edu/publications/papers/p129.pdf
http://www.dtic.mil/dtic/tr/fulltext/u2/a433708.pdf
http://deepblue.lib.umich.edu/bitstream/2027.42/90638/1/AIAA-54288-189.pdf
http://www.dtic.mil/dtic/tr/fulltext/u2/a553596.pdf
