Electronic Journal of Differential Equations. Texas State University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रElectronic Journal of Differential Equations. Texas State University.
एमएलए (9वां संस्करण) प्रशस्ति पत्रElectronic Journal of Differential Equations. Texas State University.
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