1. Chr. Hoffmann, Untersuchungen an PTFE-Wellen-Dichtunge, Dissertation, University Stuttgart, Germany, 1995.
2. M.W.J. Lewis, Friction and Wear of PTFE-Based Reciprocating Seals, ASLE Preprint, No. 84-LC-6A-2, ASLE/ASME Lubrication Conference, San Diego, CA, October 22–24, 1984.
3. Reibung und Verschleiβ von PTFE-Compounds;Landheer;Kunststoffe,1993
4. Chr. Hoffmann, H.K. Müller, W. Haas, Reibung von PTFE-Wellendichtringen, Konstruktion 48, Springer Verlag, Germany, 1996.
5. Simulation of wear particle creation in asperity contacts using the finite element method;Keer;STLE Tribology Transactions,1993