Petrovsky, I. G. (1991). Lectures on partial differential equations. Dover.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPetrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Nueva York: Dover, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPetrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Dover, 1991.
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