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URL: https://research-doc.credit-suisse.com/docView?language=ENG&format=PDF&source_id=csplusresearchcp&document_id=1051398411&serialid=jhnSujb3ggfXbmTG1 %2BBuJRKjsiaPuPMomPDIV0D6JOA%3D (Дата обращения: 10.06.2020).