Não informado. (1971). General topology and its applications. Elsevier Science Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. General Topology and Its Applications. Amsterdam: Elsevier Science Publishers, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. General Topology and Its Applications. Elsevier Science Publishers, 1971.
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