Não informado. (2005). Mathematical Notes of the Academy of Sciences of the USSR. Consultants Bureau.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Mathematical Notes of the Academy of Sciences of the USSR. New York: Consultants Bureau, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Mathematical Notes of the Academy of Sciences of the USSR. Consultants Bureau, 2005.
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