1. Beavers, G. S. and Sparrow, E. M.: 1971, Compressible gas flow through a porous material, Int. J. Heat Mass Transfer 14, 1855?1859.
2. Chan, D. Y. C., Hughes, B. D., and Paterson, L.: 1993, Transient gas flow around boreholes, Transport in Porous Media 10, 137?152.
3. Emanuel, G. and Jones, J. P.: 1968, Compressible flow through a porous plate, Int. J. Heat Mass Transfer 11, 827?836.
4. Greenkhorn, R. A.: 1983, How phenomena in porous media: fundamentals and applications, in Petroleum, Water and Food Production, Marcel Dekker, New York.
5. Goudie, J. M., Smith, E. A., and de Ville, A.: 1995, Modelling the velocity of air through beds of cereal grains, IMA. J. Math. Appl. Business Industry 5, 325?335.