(1976). Function theoretic methods in differential equations. Pitman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFunction Theoretic Methods in Differential Equations. London: Pitman, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFunction Theoretic Methods in Differential Equations. Pitman, 1976.
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