1. KOZENY, J. S., Über Kapillare leitung des wassers im boden, Sitzb. Akad. Wiss. Wein. Math-naturw. Kl., 136(Abt. IIa), 271–306, 1927
2. CARMAN, P. C., Fluid flow through granular beds, Trans. Inst. Chem. Eng., 15, 150, 1937
3. CARMAN, P. C., The determination of the specific surface of powders. I. J. Soc. Chem. Ind., 57, 225, 1938
4. DALLAVALLE, J. M., Surface area in packed columns, Chem. & Met. Eng., 45, 688–691, 1938
5. BISH, G. M., Laminar fluid flow through unconsolidated beds of spherical and non-spherical particles, Ph. D. Thesis, University of Nottingham, 1987