3Alvaro Prada, Faruk Civan. Modification of Darcy' s law for the threshold pressure gradient[J]. Journal of Petroleum Science and Engineering, 1999,22(4) :237 ～ 240.
6Olsen H W. Darcy's law in saturated kaolinite[J]. Water Resources Research, 1966,2(2): 287 ～ 295.
7Smiles D E, Rosenthal M J.The movement of water in swelling materials[J]. Journal of Soil Research, 1968(6) :237 ～248.
8Kutiler M. Non - Darcy flow of water in soils - Laminar region, a review, in fundamentals of transport phenomena in porous media[M]. Edited by Intentional New York, Association for Hydraulic Research, Elsevier, 1972: 327 ～ 340.
