Balakrishnan, A. V. (1969). Control theory and the calculus of variations. Academic Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBalakrishnan, A. V. Control Theory and the Calculus of Variations. New York: Academic Press, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBalakrishnan, A. V. Control Theory and the Calculus of Variations. Academic Press, 1969.
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