1. Pel, L., Kopinga, K., Bertram, G. and Lang, G., ‘Water absorption in fired-clay brick observed by NMR-scanning’,J. Phys. D.: Appl. Phys 4 (1995) 675–680.
2. Queisser, A., ‘Zerstörungsfreie Materialuntersuchungen an Natursandstein mittels Computer Tomographie’,Bautenschutz und Bausanierung 11 (1988) 54–60.
3. Quenard, D. and Sallee, H., ‘A gamma-ray spectrometer for measurement of the water diffusivity of cementitious materials’, Mat. Res. Soc. Symp. Proc. 137 (1989), 165–169.
4. Peterka, F., Böck, H., Pleinert, H. and Slonc, T, ‘Instrumental neutron transmission analysis technique of building material’, in ‘Neutron Radiography (4)’, Proceedings of the Fourth World Conference on Neutron Radiography, San Francisco, 1992 (Kluwer, Dordrecht, 1993) 83–93.
5. Pel, L., Ketelaars, A.A., Adan, O.C.G. and van Well, A.A., ‘Determination of moisture diffusitivity in porous media using scanning neutron radiography’,Int. J. Heat Mass Transfer 36 (1993) 1261–1267.