S. Bader, W. Haas, and B. Stiegler. Sealing technology - hidden high tech : 18th ISC, International Sealing Conference, page 505-519. Frankfurt am Main, VDMA Fluidtechnik, (2014)
G. Baitinger, and W. Haas. Sealing systems - cutting edge technology in the smallest envelope, page 341-350. Frankfurt am Main, Fachverband Fluidtechnik im VDMA e. V., (2010)