www.dtic.mil/dtic/tr/fulltext/u2/a278190.pdf
www.dtic.mil/dtic/tr/fulltext/u2/595291.pdf
www.dtic.mil/dtic/tr/fulltext/u2/005577.pdf
www.dtic.mil/dtic/tr/fulltext/u2/a474189.pdf
www.dtic.mil/dtic/tr/fulltext/u2/355191.pdf
www.dtic.mil/dtic/tr/fulltext/u2/317299.pdf
www.dtic.mil/dtic/tr/fulltext/u2/854724.pdf
www.dtic.mil/dtic/tr/fulltext/u2/595291.pdf
www.dtic.mil/dtic/tr/fulltext/u2/005577.pdf
www.dtic.mil/dtic/tr/fulltext/u2/a474189.pdf
www.dtic.mil/dtic/tr/fulltext/u2/355191.pdf
www.dtic.mil/dtic/tr/fulltext/u2/317299.pdf
www.dtic.mil/dtic/tr/fulltext/u2/854724.pdf