1. W. Lenart, W. Rau, H. Baron, Spiral stirrer unsupported at one end, US Patent 4188132, Feb. 12, 1980.
2. H.G. Trieschmann, K.H. Ambil, W. Rau, K. Wisseroth, Method of removing heat from polymerization reactions of monomers in the gas phase, US Patent 4012573, Mar. 15, 1977.
3. The Packed Bed Catalytic Reactor;Levenspiel,1999
4. Gas dispersion in packed beds;Edwards;Chem. Eng. Sci.,1968
5. Axial and radial dispersion in fixed beds;Gunn;Chem. Eng. Sci.,1987