U.S. Department of Transportation (1973). , Policy procedurę memorandum 90-2 Appendix B, Transmittal 279, February 8.
U.S. Rubber Company (1941). Some physical properties of mbber, U.S. Rubber Co., CIeveland, Ohio.
USDOE/CE-0180(2002). Insulation fact sheets, Available on http://www.oml.gov.
VDI - 2571(1976). Sound radiation from industrial buildings, VDI - Kommission Larmminderung, Graf-Recke-Str84.4000 Dusseldorf 1, Federal Republic Of Germany.
VDI 2062 Blatt 2 (1976), Schwingungsisolierung. Isolierelement, VD1-Handbuch
Schwingungstechnik, 14 S. S., Beuth Verlag GmbH.
VD1 -2720 (1997). Blatt 1 Technical rulc: guideline 1CS: 17.140.01, Schallschiitz durch Abschirmune im Freien (Noise control bv barriers outdoors Publication datę): 1997-03.