Não informado. (2001). Annual report on the mineral resources of the URSS. Geological Committee.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report on the Mineral Resources of the URSS. Leningrad, Rússia: Geological Committee, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report on the Mineral Resources of the URSS. Geological Committee, 2001.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.