W. Sextro, K. Popp, and I. Wolter, “Three-Dimensional Vibration of Bladed Disk Assemblies with Friction Dampers,” in The 7th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Proceedings of ISROMAC-7, 1998, vol. B, pp. 621–630.

K. Popp and W. Sextro, “Schwingungsverhalten von verstimmten Beschaufelungen mit Reibelementen,” in Forschungsvereinigung Verbrennungskraftmaschinen (FW) -lnformationstagung Turbinen, 1997, no. 496, pp. 131–142.

W. Sextro, “Schwingungsverhalten von Schaufelkränzen mit Reibelementen bei Frequenzverstimmung,” in VDI-Reihe, 1997, vol. 11, no. 245.

W. Sextro, K. Popp, and I. Wolter, “Improved reliability of bladed disks due to friction dampers,” in The 1997 International Gas Turbine \'26; Aeroengine Congress \'26; Exposition, 1997.

K. Popp and W. Sextro, “Schwingungsverhalten eines Schaufelkranzes mit Reibelementen bei Frequenzverstimmung,” in Forschungsvereinigung Verbrennungskraftmaschinen (FW) - lnformationstagung Turbinen, 1996, no. 490, pp. 53–76.

K. Popp and W. Sextro, “Dynamical Behaviour of a Bladed Disk with Friction Dampers,” in The 2nd European Nonlinear Oscillation Conference - Proceedings of EUROMECH, 1996, vol. 1, no. 518, pp. 157–183.

W. Sextro and B. Schmalhorst, “Static Behaviour of Drill Strings in Curved Boreholes,” Zeitschrift für angewandte Mathematik und Mechanik (ZAMM), vol. 73, pp. 255–257, 1993.

P. Stelter and W. Sextro, “Bifurcations in Dynamic Systems with Dry Friction,” in Bifurcation and Chaos: Analysis, Algorithms, Applications, vol. 97, R. Seydel, F. W. Schneider, T. Küpper, and H. Troger, Eds. Birkhäuser Basel, 1991, pp. 343–347.