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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMonotone Iterative Techniques for Discontinuous Nonlinear Differential Equations / Seppo Heikkilä, V. Lakshmikantham. 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMonotone Iterative Techniques for Discontinuous Nonlinear Differential Equations / Seppo Heikkilä, V. Lakshmikantham. 1994.
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