Authors: Davidson C.M., Nordon A. , Urquhart G.J. , Ajmone-Marsan F. , Biasioli M. , Duarte A.C. , Diaz-Barrientos E. , Grcman H., Hodnik A. , Hossack I. , Hursthouse A.S. , Ljung K. , Madrid L. , Otabbong E. , Rodrigues S.
Title: Quality and comparability of measurement of potentially toxic elements in urban soils by a small group of European laboratories