S. Jung, A. Daubner, and W. Haas. Sealing systems - cutting edge technology in the smallest envelope, page 303-316. Fachverband Fluidtechnik im VDMA e.V., (2010)401.
C. Fehrenbacher, L. Hörl, F. Bauer, and W. Haas. Tagungsband 55. GfT Tribologie Fachtagung: Reibung, Schmierung und Verschleiß, page 44/1–44/13. Stolberg-Venwegen, Druckservice Zillekens, (2014)539.
U. Frenzel, and H. Müller. Proceedings of the 14th International Conference on Fluid Sealing, page 493–503. London, Mechanical Engineering Publications, (1994)113.
H. Prokop, and H. Müller. Proceedings of the 12th International Conference on Fluid Sealing, page 147–163. Cranfield (Cranfield, Bedford), British Hydromechanics Research Association, (1989)69.
F. Bauer, M. Baumann, and W. Haas. Proceedings of 16th Nordic Symposium on Tribology - NORDTRIB 2014, page 239. Danish Technological Institute, (2014)532.