1. Chupp, R. E. and Nelson, P. “Evaluation of Brush Seals for Limited Life Engines,”. AIAA /SAE /SAME /ASEE 26th Joint Propulsion Conference. July, Orlando, FL. AIAA 90-2140
2. Ludwig, L. “Self-Acting Shaft Seals,”. Seal Technology in Gas Turbine Engines, AGARD Conference Proc. 237.
3. Ph.D. Thesis;Lattime S. B.,2001
4. Hendricks, R. C., O'Halloran, Bern, Arora, Gul, K., Addy, H. E., Flowers, J., Carlile, J. and Steinetz, B. M. “Advances in Contacting Sealing,”. Vol. 1, pp.363–371. NASA CP-3282.