Kärkkäinen, Antti and Helfert, Marlene and Aeschlimann, Beat and Mikkola, Aki (2008):
Dynamic Analysis of Rotor System With Misaligned Retainer Bearings.
In: Journal of Tribology, 130 (2), ASME, pp. 1-10, [Online-Edition: http://asmedl.org/getpdf/servlet/GetPDFServlet?filetype=pdf&...],
[Article]

Helfert, Marlene and Aeschlimann, Beat and Nordmann, Rainer (2008):
Experimental Analysis of Rotor-Retainer-Bearing Interaction.
In: The 12th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, 17. -22. Februar 2008, [Conference or Workshop Item]

Kärkkäinen, Antti and Helfert, Marlene and Aeschlimann, Beat (2007):
Effect of Misalignment of Retainer Bearings on Dynamic Responses of Rotor System During Emergency Stop.
Las Vegas, In: ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE2007), Nevada (USA), 4. - 7. September 2007, pp. 1635-1643, [Conference or Workshop Item]

Helfert, Marlene and Ernst, Martin and Aeschlimann, Beat and Nordmann, Rainer (2006):
High-Speed Video Analysis of Rotor-Retainer-Bearing-Contacts Due to Failure of Active Magnetic Bearings.
In: 10th International Symposium on Magnetic Bearings 2006, Martigny (Switzerland), 26. - 29. August, [Conference or Workshop Item]