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<http://www.pwc.com/ua/en/industry/metal_mining/assets/pwc-m-a-industry-briefing-2013-03-en.pdf/jcr:content/renditions/cq5dam.thumbnail.319.319.png.pwcimage.147.172.jpg>
<http://www.pwc.com/ua/uk/press-room/2013/mining-deals.html>