Não informado. (1975). Mathematical Proceedings of the Cambridge Philosophical Society. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Mathematical Proceedings of the Cambridge Philosophical Society. Cambridge, Inglaterra: Cambridge University Press, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Mathematical Proceedings of the Cambridge Philosophical Society. Cambridge University Press, 1975.
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