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1. "??????: ????????, ???????????? ? ??????????". ??????????? ?????????? ????????, www.rsc.org/periodic-table/element/79/gold.
2. "????????? ???????? ??????????". HyperPhysics, hyperphysics.phy-astr.gsu.edu/hbase/solids/magprop.html.
3. "??? ?????????? ?????????? ??????: 5 ??????? ??????, ??????? ????? ???????? ????". The Spruce Crafts, www.thesprucecrafts.com/how-to-spot-fake-gold-1392631.
4. "????????? ???????? ??????". Gold.org, www.gold.org/about-gold/gold-supply/gold-mining/the-magnetic-properties-of-gold.