1. Transit Noise and Vibration Impact Assessment, report FTA-VA-90-1003-06, Federal Transit Administration, Washington, D.C. (2006)
2. Nelson, J.T., Saurenman, H.J.: A Prediction Procedure for Rail Transportation Ground-Borne Noise and Vibration, Transportation Research Record 1143, Transportation Research Board, Washington D.C., (Aug 1988)
3. NNFM;L Auersch,2008
4. NNFM;L Auersch,2008
5. Nelson, J.T.: Tri-Met track vibration isolation tests, Technical Report, Prepared for Portland Tri-Met (30 Oct 1998)