R. Hansen, T. Solberg and B.H. Hjertager (2008). "CFD-Modelling of bubble size in a bubble column using the one-group interfacial area concentration equation", CFD2008
R. Hansen, J. Madsen, T. Solberg and B.H. Hjertager (2007). "Experimental determination of the bubble size distribution in a square bubble column by the use of IPI", ICMF 2007
F. Lipnizki, J. Lipnizki, R. Hansen, J. Hvidberg, B. H. Hjertager, T. Solberg, C. H. Ibsen and G. Jonsson (2003). "Membrane Spacers for Ultrafiltration: Modelling of Mass Transfer and Pressure", IMSTEC 2003