The ultrasound assisted extraction of matrix elements and heavy metal fractions associated with Fe, Al and Mn oxyhydroxides from soil sample Autori: Svetlana Stanišić, Ljubiša Ignjatović, Ivan Anđelković, Milica Stević, Aleksandra Tasić, Marjetka Savić Biserčić Časopis: Journal of the Serbian Chemical Society DOI: 10.2298/JSC110929209S