Authors: Davidson C., Urquhart G., Ajmone-Marsan F., Biasioli M., Duarte A.C., Diaz-Barrientos E., Grcman H., Hossack I., Hursthouse A., Madrid L., Rodrigues S., Zupan M.
Title: Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure