1. Agui, H.J., Bucek, M., Degennaro, A., Wilkinson, R.A. 2013. Lunar excavation experiments in simulant soil test beds: revisiting the surveyor geotechnical data, J. Aerosp. Eng, 26, 117–133, special issue: In-Situ Resource Utilization.
2. Atkinson, J.H., Lau, W.H.W. 1990. Measurement of soil strength in simple shear tests, Geotechnical Engineering Research Centre, The City University, London EC1V 0HB, U.K.
3. Moisture and density effects on soil shear strength parameters for coarse grained soils;Ayers;Trans. Am. Soc. Agric. Engrs,1987
4. Terrain evaluation for off-road mobility;Baladi;J. Terramechanics,1987
5. Baladi, G.Y., Meier, R.W. 1987. General soil model for calculating tractive forces between the terrain and a given vehicle, Proc. 9th Int. Conf. ISTVS, Barcelona. pp. 826 833.