Environmental modelling of NORM R. S. O'Brien, P. McDonald, C. Yu, V. Koukouliou, L. W. Setlow, J. Horyna, D. P. Sanchéz, T. al-Khayat, P. W. Waggitt, G. Olyslaegers et al. (4 more) Radioprotection, 44 5 (2009) 23-28 Published online: 06 June 2009 DOI: 10.1051/radiopro/20095011