1. Fluid flow through packed columns;Ergun;Chem. Eng. Prog.,1952
2. The resistance of packing to fluid flow;Blake;Trans. Amer. Inst. Chem. Eng.,1922
3. Fluid flow through a granular bed;Carman;Trans. Inst. Chem. Eng. Lond.,1937
4. Ueber kapillare leitung des wassers im boden;Kozeny;Sitzungsberichte Akad. Wiss. Wien,1927
5. Gas flow through packed columns1;Burke;Ind. Eng. Chem.,1928