M. Klaiber, F. Bauer, und W. Haas. Society of Tribologists and Lubrication Engineers annual meeting and exhibition 2010, Seite 220-223. Curran, (2010)389.
X. Jia, S. Jung, W. Haas, und R. Salant. Society of Tribologists and Lubrication Engineers annual meeting & exhibition 2011, Seite 270-273. Curran, (2011)413.