Medunić G, Juranović Cindrić I, Lovrenčić Mikelić I, et al. Copper and Zinc Fractionation in Apple Orchard Soil in the Village of Bukevje (Croatia) Using the Revised Four-Step BCR Extraction Procedure. Arh Hig Rada Toksikol. 2013;64(4). doi:10.2478/10004-1254-64-2013-2326