1. Åberg, B.: A theory for calculation of the void ratio of non-cohesive soils and similar materials. Hydraulic engineering studies dedicated to Prof. Erling Reinius, Bulletin No. TRITA-VBI-97, Hydr. Lab., Royal Inst. of Tech., Stockholm, Sweden, pp. 25–46 (1978)
2. Ahmed, N., Sunada, D.K.: Nonlinear flow in porous media. J. Hydraul. Div. ASCE 95(HY6), 1–12 (1969)
3. Allen, P.: Modelling flow over and through overtopped rockfill embankments. M. Eng. Thesis, Department of Civil Engineering, University of Queensland, Brisbane, Australia (1984)
4. ASTM method D4043–96: Standard guide for Selection of Aquifer Test Method in Determining Hydraulic Properties by Well Techniques. Conshohocken, Pennsylvania (2004)
5. ASTM method D2434: Standard Test Method for Permeability of Granular Soils (Constant Head). Conshohocken, Pennsylvania (2006)