1. The irregularities of farm roads and fields as sources of farm vehicle vibration;Wendenborn;J. Terramechanics,1966
2. Ride comfort for tractor operator IV;Matthews;J. agric. Engng Res.,1966
3. Some measurement and power spectra of runway roughness;Walls;N.A.C.A. TN3305,1954
4. Measurements and power spectra of runway roughness at airports in countries of North Atlantic Treaty Organization;Thompson;N.A.C.A. TN4303,1958
5. Statistical description of the micro profiles of automobile roads;Pevzner;J. Terramechanics,1964