Não informado. (1967). Progress of Mathematics. Academy for Progress of Mathematics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Progress of Mathematics. Allahabad, India: Academy for Progress of Mathematics, 1967.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Progress of Mathematics. Academy for Progress of Mathematics, 1967.
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