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2. P.J. Dempsey, A comparison of vibration and oil debris gear damage detection methods applied to pitting damage, Technical report, NASA/TM-2000-210371.
3. P.J. Dempsey, M. Mosher, Edward M. Huff, Threshold assessment of gear diagnostic tools on flight and test rig data, Technical Report, NASA/TM—2003-212220.
4. Η. Decker, D. Lewicki, Spiral bevel pinion crack detection in a helicopter gearbox, Technical report, NASA/TM-2003-212327.
5. P.J. Dempsey, A.A. Afjeh, Integrating oil debris and vibration gear damage detection technologies using fuzzy logic, Technical report, NASA/TM-2002-211126.