Não informado. (2003). Differential Geometry and its Applications. North-Holland.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Differential Geometry and Its Applications. Amsterdam: North-Holland, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Differential Geometry and Its Applications. North-Holland, 2003.
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