1. Lui, P. L., "Passive Intermodulation interference in communication systems," Electron Electronics & Communication Engineering Journal, Vol. 2, No. 3, 109-118, June 1990.
doi:10.1049/ecej:19900029
2. Best, G., "Passive Intermodulation (PIM) in broadcast transmission systems-lessons learned and a look into the future," 2014 IEEE International Symposium Broadband Multimedia Systems and Broadcasting (BMSB), June 25-27, 2014.
3. El Banna, B., T. Olsson, and J. Uddin, "Sources of passive intermodulation in base station antenna systems," Proc. Antennas Propag. Conf., 139-144, Loughboroughl, UK, 2006.
4. Passive Intermodulation (PIM) handling for Base Stations (BS), 3GPP TR 37.808, 2013.
5. Bayrak, M. and F. A. Benson, "Intermodulation products from nonlinearities in transmission lines and connectors at microwave frequencies," Proc. Inst. Elect. Eng., Vol. 122, No. 4, 361-367, Apr. 1975.
doi:10.1049/piee.1975.0101
6. Arazm, F. and F. A. Benson, "Nonlinearities in metal contacts at microwave frequencies," IEEE Trans. Electromagn. Compat., Vol. 3, 142-149, Aug. 1980.
doi:10.1109/TEMC.1980.303873
7. Duteil, G., F. Colombel, S. Avrillon, P. Le Cam, and J. P. Harel, "Experimental studies of passive intermodulation in metal-to-metal contacts," Progress In Electromagnetics Research M, Vol. 60, 67-73, 2017.
doi:10.2528/PIERM17062810
8. Vincente, C., D. Wolk, H. L. Hartnagel, B. Gimeno, V. E. Boria, and D. Raboso, "Experimental analysis of passive intermodulation at waveguide flange bolted connections," IEEE Trans. on Microwave Theory and Techniques, Vol. 55, No. 5, May 2007.
9. Geometrical Product Specifications (GPS) - Surface Texture: Profile Method - Terms, Definitions and Surface Texture Parameters, ISO-4287, 1997.
10., Mechanical, ANSYS, Release 14.0, ANSYS, 2009.