Gustafson, K. E. (1999). Introduction to partial differential equations and Hilbert space methods (Third edition, revised.). Dover Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGustafson, Karl E. Introduction to Partial Differential Equations and Hilbert Space Methods. Third edition, revised. Mineola, N.Y: Dover Publications, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGustafson, Karl E. Introduction to Partial Differential Equations and Hilbert Space Methods. Third edition, revised. Dover Publications, 1999.
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